question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: Is it possible to model an Integrated Coal Gasification Combined-Cycle Power (IGCC) process with Aspen Plus? | Solution: Aspen Plus is shipped with a number of example files including a few examples of coal gasification. Both Aspen Plus backup (.bkp) files and PDF files describing the details are included in the install directory for most examples. The files for a model of an Integrated Coal Gasification Combined-Cycle Power (I... |
Problem Statement: How do I get Data Regression and Property Analysis Results to match? | Solution: In order to illustrate how to get Data Regression and Property Analysis (formerly called Prop-Table) results to match, an example file using Vapor Pressure vs. Temperature data to regress PLXANT parameters is attached.
By default Data Regression uses a Maximum Likelihood algorithm. This means that there are e... |
Problem Statement: AspenONE V10.0 SLM Server Installation Guide. | Solution: Please refer to attached pdf for more information.
Keywords: SLM, License Server, Installation
References: None |
Problem Statement: When using the ABE Explorer Simulation importer in ABE V10 to import a PRO/II V9.X file the following error appears:
"Unable to create simsci OLE automation object". | Solution: In order to import a PRO/II V9.X file using the ABE Explorer Simulation importer in ABE V10, the ProII.ini file should properly initialize. As the screenshot below shows the PROII.INI that resides in the program folder, as it existed in previous versions, is NOT the correct version to should be referenced. (A... |
Problem Statement: Is it possible to create a design specification with variable tolerance and limits? | Solution: Attached is an example of a Design Specification with variable tolerance and limits. See file - Design-spec2.bkp.
A design specification designates that the inlet and outlet entropies of a Heater block HX1 are equal. The temperature of HX1 is chosen as the manipulated variable. Temperature limits cannot be se... |
Problem Statement: Is it possible to model a Pipeline Gas from Coal Model with Aspen Plus? | Solution: Aspen Plus is shipped with a number of example files including a few examples of coal gasification. Both Aspen Plus backup (.bkp) files and PDF files describing the details are included in the install directory for most examples. The files for a model of a Pipeline Gas from Coal Model are located in the follo... |
Problem Statement: I want understand the Simulation Messages in Aspen Custom Modeler:
Is the Step Time different to the integrating time?
Why is the step size "accepted"?
What influences the number of integration steps?
Can I change the frequency of these messages?
Do these messages have anything to do with simulation ... | Solution: The best way to explain the messages is with an example. Please see below (and attached) and marked-up screenshot of the simulation messages with an explanation of the different sections.
The Step count refers to the variable step integrator which is selected in Solver Options | Integrator | Step size. If the... |
Problem Statement: How to find Class View Application in the CLE (Class Library Editor). | Solution: One can find the Class View Application right-clicking under the Class View in question and selecting Properties | Application:
This information is important to know, in order to see which datasheet, symbol or label use this Class View in specific.
Keywords: Class View Application, Properties.
References:... |
Problem Statement: Is it possible to control reactor selectivity? | Solution: Attached is an example of using a design specification to control reactor selectivity with the reactor temperature. See file Design-spec.bkp.
The temperature of an RGibbs block REACT is manipulated to control the selectivity of component ESTER versus ETOH at a value of 2.50 +/- 0.01. This example assumes that... |
Problem Statement: We have developed some user models (property, heat transfer, pressure drop, unit operations...) in C++ and would like to use them from Aspen Plus. Is that possible? And how? | Solution: Aspen Plus offers a wealth of interfaces to user subroutines written in Fortran, as documented in the User Models
Keywords: None
References: Guide. We provide template subroutines in \Program Files (x86)\AspenTech\Aspen Plus xx.x\Engine\user. The user written Fortran code has to be compiled using the built-in... |
Problem Statement: Is it possible to accessing a mole fraction profile in a RadFrac distillation column? | Solution: Attached is an example of accessing a mole fraction profile in a RadFrac distillation column. See the file Molefrac-profile.bkp.
You can use the vector variable types to access an entire block profile, stream or substream at once. Aspen Plus interprets the variable you assign to the vector as an array variab... |
Problem Statement: How can binary parameters from one property method be used in another property method? | Solution: You can generate VLE and LLE data for a binary system, using a specified property method. Then, you can use the generated data in data regression to determine the binary parameters for another property method. This generated data can be regressed alone or with other data sets. With this feature you can conver... |
Problem Statement:
How do I set up a shortcut drying model? How do I define solid stream types? How do I overcome dryer model errors and warnings? What does it mean to define moisture in the solid stream class? | Solution:
Have a look at the attached Aspen Plus V10 simulation file, Drying_start.bkp.
1. Components:
In this example, cobalt solid on a zeolite substrate is being dried in air. The cobalt and the zeolite components are of Type: Solid. The component list also contains air and water, these are of Type: Conventional. ... |
Problem Statement: When Using HeatX block in EO mode, one cannot see results for block. In EO-Variables table there are only variables for connected streams.
Is it something wrong with block specification? Where to find variables like: Duty, PDrop, U, A for the HeatX block? | Solution: HeatX block allows phase splitting into 2 or 3 outlet streams for each side of the heat exchanger.
However, multiply product streams are not supported in EO-mode, and when using this feature HeatX block display in EO-Variables table only results for streams connected to heat exchanger.
To see all block varia... |
Problem Statement: Column section pressure drop is not updated when the overall section efficiency is changed in Column Hydraulics. Is overall section efficiency used? | Solution: In Aspen Plus V10, the overall section efficiency on the Column's Column Internals | Sections | Geometry | Design Parameter form is used in the pressure drop calculations if "Update pressure drop" is selected on the Column's Column Internals | Sections form. However, the overall "Section pressure drop" result... |
Problem Statement:
No stream results reported in Aspen Plus | Solution:
There is an option in Aspen Plus on the Setup | Report Options | General sheet to skip the report generation completely.
This option is sometimes used to turn the report off when models for real-time optimization since the user would never see the report anyway. However, it has the side effect of preventi... |
Problem Statement: How do I launch Aspen Plus from the Command Line (DOS-like window)? | Solution: To open Aspen Plus from the command line rather than the graphical user interface, please navigate to Start | AspenTech | Aspen Plus VX | Customize Aspen Plus VX
Keywords: None
References: None |
Problem Statement: Hydraulics T-Junction Mixer arm angle reference | Solution: To specify the design of the T-Junction Mixer:
On the Design tab, click the Data page:
In the Side Arm Angle to Main field, type in the angle value of the mixer side arm.
In the Side Arm Angle to Vertical field, type in the angle value of the mixer side arm.
In the Main Arm Angle to Vertical field, type in ... |
Problem Statement: How to access batch time from Aspen Batch Modeler in Aspen Simulation Workbook.
An important result from a batch model is the batch time. This tip shows you how to access the batch time from an Aspen Batch Modeler simulation through Aspen Simulation Workbook. | Solution: The batch time is the variable CurrentTime. For batch model B1, it is B1.CurrentTime.
1. Open attached Batch Modeler V10 file BenzeneMCBDCB.bspf and run it. Find that it ends running at Batch time = 1.39 hours.
2. Close Batch Modeler file.
3. Open predefined Excel and ASW file Batch_ASW.xlsx and connect t... |
Problem Statement: How do I prevent error -939519987 when installing a new license file?
Description of error message :
Server: Local license server (NO-NET)
Bucket: default
Type: Standard License
Code: -939519987
Description: This may be due to a time-restriction on the license | Solution: Note : This solution is applicable only for stand-alone license
This error is encountered only when the license file is not properly installed and initialized.
Also, it is possible that the old license file (which has already expired) is still present in the same location
In order to solve this error, the o... |
Problem Statement: In Stream | Properties, there is water dew point[Gas] property and it is indicated at Liquid phase property.
User might get confused when 'Water Dew Point' is indicated in liquid phase. | Solution: Water Dew Point - Liquid Phase : This is the temperature when aqueous phase is formed based on the current composition and pressure of liquid phase.
After separate this liquid phase and decrease the temperature, user can find that aqueous phase is formed at -25.41 ℃. Thus, water dew point means 2nd liquid for... |
Problem Statement: Adding Server Name to SLM Configuration Wizard gets a Server Error:
"Error_while_checking_out_license_(SLM_LicenseProfile) 1000
Do you still wish to add the server?" | Solution: In this situation, the user moved the network license file, moved the USB dongle to another machine, installed the SLM Server, but did not install the dongle driver.
To resolve this issue follow these steps:
1. On the SLM Server, install the dongle driver from the aspenONE Engineering media and ensure to ... |
Problem Statement: How to copy values from a snapshot or a result with a script? What is the difference between ResultCount and SnapshotCount? How to trap an error if the snapshot or result does not exist? | Solution: This script can be used to copy values from a result.
' Before using any of the Automation methods and properties, you need to issue
' a Refresh command. This command ensures that automation has access to all the
' currently available snapshots and results in the simulation.
' If you do not issue a Refresh ... |
Problem Statement: The Constant Superimposed Backpressure (BP) is the pressure at the valve tail pipe outlet imposed by the discharge environment. The constant superimposed backpressure is the backpressure which will not vary based on the state of the discharge system (that is, simultaneous discharge from other valves ... | Solution: To change the superimposed BP for existing scenarios, rather than starting your PSV design from the beginning, you can add the pressure difference between your desired value and default value to the Variable Superimposed BP instead. This will have the same effect as updating the Constant Superimposed BP becau... |
Problem Statement: How to remove or edit the characters next to the big arrows of feed and products streams?
A file may become corrupt, and in its recovery it may have put characters next to the arrow icons of feed and product streams.
What are these characters called? How can I remove them? How can I change them? | Solution: The characters next to the feed and product arrows are called terminators. They can be found in the Flowsheet preferences under File | Options | Flowsheet | Formatting. Change the text in the terminators box to change the characters next to the feed and product stream arrow icons.
Keywords: Flowsheet formatti... |
Problem Statement: How to use the optimization tool in Aspen Plus, an example used in the the removal of CHC and BTEX from groundwater by stripping with air.
Process description:
Groundwater flowrate is 10 m3/h containing 5 mg/L tetrachloroethylene, 1 mg/L trichloroethylene, 5mg/L benzene, 3 mg/L toluene. The groundwa... | Solution: Properties Environment:
The components selected are WATER (ground water), C2CL4, C2HCL3, BENZENE, TOLUENE (groundwater contaminants), N2, O2 (air), HCL (for water pH), CACO3 and MGCO3 (for water hardness). The property method was set up using the Electrolyte Wizard, because acid, CaCO3, MgCO3 in water will fo... |
Problem Statement: Hydraulics T-Junction Mixer arm angle reference | Solution: To specify the design of the T-Junction Mixer:
On the Design tab, click the Data page:
In the Side Arm Angle to Main field, type in the angle value of the mixer side arm.
In the Side Arm Angle to Vertical field, type in the angle value of the mixer side arm.
In the Main Arm Angle to Vertical field, type in ... |
Problem Statement: Why is the pure component thermal conductivity (K) different to the mixture thermal conductivity (KMX) for a stream containing a single component?
In the attached Aspen Plus V10 file called Default.bkp, see the stream results for S1. This stream contains only ethylene. However, the pure component the... | Solution: The reason why the two values are different is because the selected property method (RK-SOAVE in this case) is using different routes to calculate thermal conductivity for pure components and for mixtures, and because the stream is at high pressure, these two models give quite different results. To see which ... |
Problem Statement: When looking for the Data and Configuration Wizard in V10, it is not available in the Start Menu. Neither can it be found through using keywords such as "data", "transfer" or "wizard". | Solution: The reason Data and Configuration Wizard cannot be found using words like “data”, “transfer” or “wizard” is due to the fact that it is not available as a shortcut in the Start Menu.
The executable, Infoplus21SettingsWizard.exe, for Data and Configuration Wizard can be found in C:\Program Files (x86)\AspenTec... |
Problem Statement: Why is the isentropic exponent for a mixture containing a single component not equal to that of the pure component?
How to customize the property method to result in the identical isentropic coefficients for mixture and pure component when the stream contains only a single component. This is done by ... | Solution: Isentropic exponent is calculated using molar volume. For identical pure component and mixture isentropic coefficients for a stream containing a single component, check that the molar volume for a mixture and a pure component are being calculated with the same model.
The attached video (ISENEX.wrf) will take... |
Problem Statement: Trouble reading stream properties from XML file with multiple units of measure
Cause
This problem can happen when the simulation requests a specific unit of measure (UOM) in one Property Set that is not the default unit and does not request this UOM in any other Property Set. The XML file needs to ... | Solution: If there are no values for a property in their XML report, either (1) evaluate the XML for secondary property tags that may contain the data just separated out, or (2) review the property sets to see if they are requesting inconsistent UOMs for the same property in different property sets.
Either add the ot... |
Problem Statement: What do the following .bat file in the APED folder do?
DBCreate.bat
DBInfo.bat
DBRestore.bat
DBStart.bat
DeleteDBInstance.bat | Solution: These batch files can be used to perform some basic functions in the APED Database Manager. Please note that it is not necessary to use these batch files. The commands used in these batch files are already integrated into APED GUI tools, Database Manager and Database Tester. These batch files are still delive... |
Problem Statement: Aspen Economic Evaluation には３つの製品がありますが、違いは何ですか？ | Solution: 添付の資料にまとめましたので参照ください。
Keywords: Japanese, 日本文、Aspen Capital Cost Estimator, Aspen Process Economic Evaluator, Aspen In-Plant cost estimator, 特徴
References: None |
Problem Statement: Why do I get an error massage in Aspen EDR while converting the shortcut HeatX block to shell & tube through Aspen Plus. Three property data sets were created for stream & while running the same in EDR gives error massage – “Specific enthalpies for the stream do not increase with temperature”. | Solution: It is observed that in some cases, while converting from shortcut exchanger to shell & tube mode through Aspen Plus, the three property sets would be generated with respect to pressure & if user run the simulation - gets Input Error - 1802 error massage for property.
This is due to the temperature difference ... |
Problem Statement: Why is critical pressure Pc of Triethylene Glycol (TEG) in Aspen HYSYS completely different from reported values from other sources and literature? | Solution: TEG critical pressures reported in many literature are around 450 psig, while that value Pc in Aspen HYSYS is 191 psig. The incorrect value in HYSYS is due to historical reason when the software was developed from Hyprotech - likely that it was adjusted to match TEG vapor pressure for HYSYS PR . We have deci... |
Problem Statement: Aspen Batch Modelerのバッチ蒸留塔やバッチ反応器のチュートリアルや例題ファイルはありますか？ | Solution: チュートリアル
チュートリアルはAspen Batch Modelerのアプリケーションの中のHelpメニューからアクセスできます。
Aspen Batch Modelerを起動 (Start / Programs / AspenTech / Process Modeling V8.8 / Aspen Batch Modeler)
ToolbarからHelpメニューを検索 (Help / Aspen Batch Modeler Contents)
画面左から、“Getting Stated with Aspen Batch Modeler”をクリック。
サブメニューから、“Tutorial”をクリック。
例... |
Problem Statement: Some settings can be changed when clicking in areas of dialog box that are far to the right of the actual checkbox. | Solution: When maintaining settings in the dialog boxes, it is possible to inadvertently change settings by clicking far to the right of an actual checkbox. For example, a click in the area highlighted below will change the setting “Allow Zero Purchases for VPOOL Components”. Please be careful about where clicks are ... |
Problem Statement: How does EXTRA-ML on the RadFrac Convergence | Advanced work? | Solution: If a design specification in a RadFrac column does not converge, there is generally a message in the Control Panel about the Middle Loop not converging.
In later versions, this warning suggests that the user can specify EXTRA-ML:
* WARNING WHILE EXECUTING UNIT OPERATIONS BLOCK: "REFINING" IN "DISTILL"
... |
Problem Statement: Aspen Audit & Compliance Administrator is showing database error and the account used to configured Aspen Audit and Compliance Database service had been verified to be using the correct password. | Solution: In this case, this may have been caused by a change in the database related to the account used specifically if it is Microsoft SQL Server.
In Microsoft SQL Server Management Studio, go to Security | Logins and check on the Properties of the account used which generally is AspenAE.
In General page, check that... |
Problem Statement: There is a feature in Aspen PIMS for SQL Server Database Support. It allows you to send results to a SQL Server database or both Access and SQL server. But first, you have to configure an Aspen PIMS output database in SQL using scripts comes from the Aspen PIMS installation. This solution describes t... | Solution: Aspen PIMS model execution has a unique identifier, Solution ID, associated with each run. When an execution run occurs, the solution data is written to an output database. All report data is obtained from the output database that is specified from the General Model Settings | Output Database.
The following i... |
Problem Statement: Step by step ABE V10 installation instructions | Solution: 1. To install the Aspen Engineering Suite (AES) V10 software, including ABE V10, open the AES V10 media folder and lauch the 'Setup.exe' file.
2. The AspenOne Installer window will open. Select the 'Install aspenOne Products' option in the Welcome page.
3. Read an accept the 'aspenONE Software... |
Problem Statement: This article features an example of a particle size separation process using classifier, screen and cyclone models. The example incorporates solid substreams, PSD and various solids models including a cyclone in design mode. The attached example (PSD classification.bkp) was created in Aspen Plus V10. | Solution: The flowsheet is based on a basic harvested grain cleaning process with a feed mixture of rice grain, rice husk and soil stones. The husk, stones and fines are removed from the rice which can then be polished in a mill.
Components
Rice and Husk are defined as non-database solids and stone is assumed to be s... |
Problem Statement: Sometimes you are going to notice that your model is optimized to optimal when using a set of unit of measure but infeasible using another. For example, if you start with MBbl and MLbs and change to Bbl and MT, your model will be infeasible if you do not change any other components. Does this mean th... | Solution: Yes, volumetric UOM in the setting dialog is used to set the scaling during optimization.
Scaling works fine in both the cases (Volume is either MBbl or Bbl) as the objective function is solved in both the cases.
However, few properties are out of spec (when UOM is MBbl), mainly due to the conflict between b... |
Problem Statement: This knowledge base article describes how to resolve the following error message. This error occurs when I try to launch my Aspen HYSYS application.
Required Component Missing. Please see the ReadMe file for further information.
The application is unable to continue due to error 80040154. | Solution: This knowledge base article describes why error 80040154 occurs and different ways to resolve the error.
The error message may occur because the STRGXI2.dll is missing, not registered properly, or it is registered under a different directory. The proper location for STRGXI2.dll file is at
"C:\Program Files (x... |
Problem Statement: It is common to see after running an MPIMS/XPIMS model, the top part of full solution report has different economic values from economic summary section of the report. How to resolve this? | Solution: This is a known issue.
MPIMS local model buy and sell tables need to match global supply and demand tables. A mismatch would cause the global economic summary report objective function different than the objective function reported at the top of the full solution report.
Resolution Steps: Add the mismatch... |
Problem Statement: There might be active penalties set up in your PIMS model. For example, if you have PENALTY column filled out in CAPS and SCALE, or infeasibility breaker price/cost in BUY or SELL. You know that the penalty factor is activated. However, in the full solution report, you don’t see the “Model has active... | Solution: This is a defect that is fixed in V10 CP3 and beyond. The defect number is 382050 in the release notes. Please have it installed and you will see the penalty section reported.
If you are using V8.8 and already on the latest patch (CP5), you don’t have to worry about this issue. This is not seen in V8.8 at al... |
Problem Statement: How do you enter an equilibrium constant (Keq) expression for a reaction? There does not seem to be a way to do this for the equilibrium reactors REquil or RGibbs. | Solution: Equilibrium reactions that have the Keq computed from a built-in expression are available using GENERAL Reactions in a RCSTR, RPLUG, RBATCH, or BatchOP. The Reaction Class needs to be specified as "Equilibrium" and then the reaction parameters can be specified as "Compute Keq from built-in expression" on the ... |
Problem Statement: In PIMS V10, you might experience the following:
When generating the case comparison file, only the runs generated in the current session of PIMS are available to for case comparison generation. | Solution: s are retained between sessions if I save and close the model and re-open.
Solutions are not available for case comparison generation if I save the model as a new file name, although the files are kept in the directory.
Solutions are not available for case comparison generation if I paste in solution spreadsh... |
Problem Statement: How do you enter an equilibrium constant (Keq) expression for a reaction? There does not seem to be a way to do this for the equilibrium reactors REquil or RGibbs. | Solution: Equilibrium reactions that have the Keq computed from a built-in expression are available using GENERAL Reactions in a RCSTR, RPLUG, RBATCH, or BatchOP. The Reaction Class needs to be specified as "Equilibrium" and then the reaction parameters can be specified as "Compute Keq from built-in expression" on the ... |
Problem Statement: How to setup a centralized SQL Server to host Aspen Properties Database | Solution: This solution article will help you to host the Aspen Properties Databases on a Central SQL Server Machine.
Please follow the below steps to host the Aspen Properties Databases on a SQL Server:
· Insert aspenONE Vx.x Engineering Installation Media.
· Go to .\aspenoneengdvd\core\APEDDB\ folder... |
Problem Statement: Upgrading a Batch Extractor db from V8.7 to V10 fails with error “An internal error occurred within Wizard.dll. Error: Error HRESULT E_FAIL has been returned from a call to a COM component.” | Solution: This error is the result of a missing line in the BatchExtractor.xml file
Missing line from BatchExtractor.XML
<Upgrade from="12.7.0" to="12.8.0"><Step name="schema" type="2">BatchExtractor\EXTRACTORV1270toV1280_schema_mssql.ddl</Step></Upgrade>
Note: Adding the above line into the ..\AspenTech\DatabaseWizar... |
Problem Statement: How do you simulate a polyolefin purge bin model? | Solution: Attached is an example of a polyolefin purge bin represented using a User Aspen Custom Modeler block in Aspen Plus. This model can be used in V10.
Aspen Custom Modeler (ACM) is a general purpose flowsheet simulation tool which lets you develop your own steady-state and dynamic models. ACM is an equation-bas... |
Problem Statement: I am getting an error saying 'Model Open Cancelled' when I try to open a file in V10. What is the reason and is there a fix? | Solution: This issue is specific to V10 CP4 and earlier versions. The issue is likely occurring when you open the file on a network drive. AFR inadvertently puts the VstaTemplate.dll and VstaTemplate.pdb files into the model file instead of the installation drive.
Following is a fix for the issue:
Make a copy of the m... |
Problem Statement: When you experience any issues with Baseload service not starting up | Solution: Baseload service is not starting up
1 - Click on Baseload Tokens icon - in AspenONE SLM License Manager
2 - On the left side of screen expand the "+" symbol for corresponding tokens
If you see the value of "0" - zero - Then open the services panel by typing services.msc - in the start run
3 - Scroll down ... |
Problem Statement: Why does error “An error occured while attempting to save the workbook” shows up? | Solution: When a simulation is converged and the Results for Streams are available, you have the possibility of sending the results to Excel, both by Right-Clicking on the corner of the table or at the top of the window on the Report section:
When clicking the Send to Excel option, the next window comes up, a... |
Problem Statement: In the online help there is a description about option codes which can be used. In theory one should find description for all possible models and option codes which can be used.
However, when checking ESRK2 model, one can see that 2 option codes can be selected, but documentation is not saying what ... | Solution: ESRK2 model is described as: Redlich- Kwong equation of state model (PML implementation) with option to calculate enthalpy of water from NBS steam tables.
One can specify two option codes:
Option code Value Description
1 0 This option code determines if water is present in current mixture.
0: Do Not identify... |
Problem Statement: In PSCP, the Cut Strategy options in the dropdown list are not mapped to the corresponding function correctly. | Solution: The Cut Strategy options in the dropdown list are actually mapped to these settings:
Default Strategy – No Cuts
No Cuts – Conservative Cut Strategy
Conservative Cut Strategy – Moderate Cut Strategy
Aggressive Cut Strategy – Aggressive Cut Strategy (correctly mapped)
The bug is targeted to be fixed in a future... |
Problem Statement: Aspen Plus documentation on rigorous plug flow reactor model (RPlug) states that residence time is calculated based on the phase fraction mole flowrate of each stream passing through the block (see equation below). Phases handled are vapor, liquid, liquid and solid (conventional and non-conventional)... | Solution: Residence time is defined by the volume of the reactor divided by its total volume flow rate. What RPlug does is to sum all volumes from each stream phase present to estimate the total volume passing through the block. To calculate such volume, instead of using “molar fraction of phase j” as the equation abov... |
Problem Statement: Error message when adding variables to Aspen Online project and variables added don’t appear in grid. | Solution: When adding a variable to the project, Aspen Online gives an error message with regards to the unit of measure:
After selecting done, the Variable-Tag grid is empty and none of the added variables show up. This is a known issue and has to do with the variable physical type not getting correctly built in the m... |
Problem Statement: During a very large regression run, Aspen Plus/Properties may take a considerable amount of time to perform all calculations before finally converging. For those complex cases, an error message may appear stating that the engine has crashed.
This is a time-out issue, meaning that the engine r... | Solution: A quick workaround is to edit your local mm.ini file located at Program Files (x86)\AspenTech\Aspen Plus V10.0\GUI\Xeq and set the first inter_timeout to blank. This will make the timeout period infinite and will allow time for the regression to fully run regardless of how long it might take.
Note: thi... |
Problem Statement: There is a conflict in the Help Content for the Control Valve Option- Handling Densities for Multi-Phase Systems Rigorously. This Option can be found from within the Valve Property view, Rating Tab, Options Page
(see snapshot below):
The Help displays two conflicting explanations for the same optio... | Solution: This conflicting explanation is a mistake and a Known Issue. The correct explanation for this option should read:
Options Page
The Options page lets you select the method to handle multi-phase streams.
Handle Densities for Multi-Phase Systems Rigorously
For the Handle densities for multi-phase systems rigoro... |
Problem Statement: Hysys freezes at the stage of loading Properties Databases | Solution: There are several reasons why the program may not run and freeze at the stage of loading Properties Databases:
1. If the computer has multiple versions installed, then the problem may be related to the conflict of installed versions of the property databases. To solve this, select the version that will be l... |
Problem Statement: VSTS 256618: When running Case Studies, specified units for a variable in the Vary tab are ignored. | Solution: When running Case Studies on Aspen Plus, the units specified for a Vary variable property aren't retrieved correctly.
For example, consider a Case Study that has Pressure and mmHg selected as the modified variable unit on the Vary tab:
As seen on the previous screenshot, Pressure is specified as Vary... |
Problem Statement: For Polymer example, case file and its manual is different. This KB is to notice this defect.
The exponent for gel effect's initial estimate is different between manual and case file (psea.bkp) .
Case file has 0.1 while the manual describe 2.0. Moreover, regressed result is slightly different.
> ... | Solution: Case file is incorrect.
2.0 is right approach for this simulation. The reaction rates slow down at high conversions because the polymer molecular mobility decreases (so the reaction becomes diffusion limited). The diffusion rates of small molecules in the polymer phase remains relatively high. Thus the gel e... |
Problem Statement: Live agents may fail to process data from certain historians. The following error message will be seen in the Agent Service log file:
Could not load file or assembly 'Mtell.Sensor.Common, Version=36.0.1.17186, Culture=neutral, PublicKeyToken=e217e27c1617e401' or one of its dependencies. The system ca... | Solution: 1. Stop the Agent Service on the machine on which it is installed. You can do this either using the Task Manager or the Service Console.
2. Copy Mtell.Sensor.Common.dll from the System Manager folder to the Agent Service folder. The System Manager folder path is typically “C:\Program Files\AspenTech\Aspen Mte... |
Problem Statement: When a controller that belongs to an Aspen Composite changes structure (i.e, new variables, change variables order, new sub-controllers), the Composite will produce this error and shed all controllers.
"OTF workspace required > allocated space"
In addition, the Production Control Web Server (PCWS) ma... | Solution:
Redeploy the Composite application will force it to reload all the information needed to run the application properly.
Keywords: Composite, OTF
References: None |
Problem Statement: How to fix a ENG installation that hangs in the Hysys installation at 9% | Solution: If your Engineering suite installation is stuck at 9% of the Hysys installation for more than 25 minutes and the last action recorded is:
ATRegisterFile.BA3F7B28_1307_4630_902E_55D684AF3A97. Return value 1.
You can verify this by checking the current process running (1) or by checking the last recorded acti... |
Problem Statement: How to converge Short Cut Column when making a large change to Feed? | Solution: Short Cut column needs hard reset to solve in Yield Fraction mode when making a large change to Feed.
The column uses an Equation Oriented solution to solve. It uses the last successful solution as a starting point for the next solve. Normally this makes it much faster to solve. However, if the actual solut... |
Problem Statement: Under certain circumstances, Aspen Utilities Planner (AUP) is unable to run a Multi-Period Optimization. The user will get the message “ERROR: 6 - Arithmetic operation resulted in an overflow”
Optimization Complete - solution found
Normal Completion
Feasible Optimisation | Solution: found
Processing Results...
Update Optimization Results...
Results generated
Calculating marginal costs
Xpress-MP licensed by Dash to AspenTech for Aspen Engineering Suite
Fixing globals...
ERROR: 6 - Arithmetic operation resulted in an overflow.
END
POSTPROCESS
ERROR: 6 -
END
Successful: Exiting Optimisation... |
Problem Statement: Re-ordering of component list causes change in calculated duty for stream = VSTS 403057 | Solution: It is possible to select binary parameters for a pair of components from a databank that is NOT selected on the databanks sheet. These binary parameters are used and may result in significant differences in calculations on the flowsheet such as heat duties.
When components are re-ordered, the parameters whic... |
Problem Statement: Aspen Plus V10 Exchange is still unable to communicate with the Exchange server after installing the Emergency Patch 12 (aspenONE Exchange will stop being able to communicate with the Exchange server after Feb 4th, 2019. Apply patches today to avoid disruption) | Solution: In this case, the users will need to manually extract and place the fix file (*.dll) on their machine:
Please follow the next steps:
1. Be sure Aspen Plus V10 is closed
2. Download the file AP_V10.0_EP12.exe from aspenONE Exchange V10.0 Emergency Patch
3. Unzip the *.exe file
3. Open the unzipped folder and g... |
Problem Statement: We have scheduled biases defined in the model, but there is no daily results published in _BIASRESULTS table. How does it work? | Solution: For the versions before V11 there is a documentation error in Help file saying daily results will be stored in _BIASRESULTS.
APS has always written periodic data in _BIASRESULTS which is not a usual convention. In V10 we agreed to move periodic results to _ZBIASRESULTS to match with usual convention. But, the... |
Problem Statement: How do I resolve an Aspen Icarus Reporter - Database Connection Error? | Solution: This error may be resolved by un-installing and re-installing Microsoft Access Database 32-bit via the following link:
Microsoft Access Database Engine 2010 Redistributable
Note this issue is related to the old reporter (version 10 and older). It does not apply to the new reporter (V11 and newer).
Keywords... |
Problem Statement: There is an enhancement implemented in APS V10 CP2 – VSTS 453264 “Enhancement - Publish required information for pipeline line fill”, which requires db upgrade.
If users plan to use this feature then they can upgrade their database following the usual upgrade process i.e. run DBUpdate using the new O... | Solution: That is a Known Issue, which will be resolved for future V10, V11 and V12 patches. Please use attached OrionDBGen.mdb in DBUpdate utility as a Baseline DB to upgrade your unversioned but modified file to use feature from VSTS 453264.
Keywords: CP2
OrionDBGen
Patch
DBUpdate
References: None |
Problem Statement: Quick Tips for using the Object-Oriented Modeling Framework (OOMF) language in the Aspen Plus Engine | Solution: Aspen Plus Equation Oriented (EO) commands are written in the OOMF language therefore these commands can be accessed at the Aspen Plus engine level and by-passing the Aspen Plus user interface.
This enables the user carry out quick operations, check EO modeling settings or print OOMF commands with or without ... |
Problem Statement: How do I create a user-defined prop-set property to calculate enthalpy of steam? | Solution: To get the enthalpy in the steam tables reference state, you need to add 15970312.47 J/kmol to the enthalpy value to account for the enthalpy of water at its triple point.
The attached example shows a user-defined prop-set property to calculate enthalpy of steam. The prop-set displays steam enthalpy based on ... |
Problem Statement: In Aspen Utilities Planner Excel user interface, ‘Do you want to save the profiles and tariff in the databases?’ message (figure 1) may pop up. How to get rid of this message?
Figure 1. Do you want to save the profiles and tariff in the databases?’ message | Solution: Please follow the steps showed in figure 2 (can be downloaded in Attachment section). In Excel Developer Ribbon, click Visual Basic button. Find the ThisWorkbook code in pop-up window. After commenting out the related VBA code by using single quotation marks and saving the changes, this message will not pop u... |
Problem Statement: When I open Aspen Flare System Analyzer, I get the following error.
Error Message: Unexpected exception: Resolution of the dependency failed, Type = “FnetApplication.PFDScreen”, name = “(none)”.
Source: Microsoft.Practices.Unity
Target: DoBuildUp
Why does this error occur? How do I fix this error? | Solution: With Aspen Flare System Analyzer V10, in certain customer machines there may be a crash when the customer opens the process flowsheet or open an old case.
To resolve the issue, suggest installing the following patches in orderly manner.
1. Cumulative Patch V10.0 CP1 for Aspen Flare System Analyzer
https://... |
Problem Statement: Is it possible to modify the Binary Parameters (BIP) for an Aspen HYSYS Fluid Package using VBA? | Solution: When using VBA, the user will not find a variable to call and edit the Binary Parameters through Automation.
However, the user can still call and edit these variables using backdoor monikers into their VBA code.
For more information on how to evoke backdoor variables and obtain the backdoor monikers pleas... |
Problem Statement: How to report the radius of gyration (RGYR)? | Solution: The Radius of gyration or gyradius of a body about an axis of rotation is defined as the radial distance of a point from the axis of rotation at which, if whole mass of the body is assumed to be concentrated, its moment of inertia about the given axis would be the same as with its actual distribution of mass.... |
Problem Statement: As mentioned in the following article Aspen Plus COM Automation using Matlab the user can call an Aspen Plus model and change the inlet parameters by using our Matlab code.
However, if the user wants to access to a parameters that has a "space" in its path (i.e. Aspen.Application.Tree.FindNode("\Da... | Solution: To solve this issue the user can follow these steps:
Use a calculator block and link the desire variable in the embedded excel file.
Create a live link (with the special paste option of excel) between the cell of the embedded an a cell of a normal xls file.
In Matlab access to the specific cell of the xls fi... |
Problem Statement: If the user has different reaction sets and wants to evaluate their performance in a kinetic reactor, then ASW can be use to switch among different reaction sets available already in the Aspen Plus model. | Solution: To choose a specific reaction set, please go through the following steps:
1- Open the organizer form and click on the Browser button.
2- Select the "RXN_ID" variable from the variable path as shown in the screenshot below.
Note: Instead of "RI" the user should point to the name tag of the kinetic reactor
... |
Problem Statement: Can I force a specific order to solve objects in my simulation? | Solution: The default order of calculation in HYSYS is generally recommended for most simulations. However, in some specific cases, based on detailed knowledge of your model, and understanding of the degrees of freedom involved in the solution, you may wish to have the objects in your flowsheet solve in a specific orde... |
Problem Statement: How to be able to view the correct Trend data for a stream in the APS Event Screen ?
The screen-shot below shows the issue: | Solution: A Trend screen graphically depicts the Minimum bounds, Maximum bounds and the Points at which bounds have not been maintained.
Moving the cursor over a trend line displays a tooltip that shows the time corresponding to the mouse position as well as the Y-values of all curves. Charts that are highlighted in re... |
Problem Statement: How to access Aspen Process Manual(APM) from Aspen Plus | Solution: It is accessible from All Contents under Resource tab as below:
1. Go to the resource tab, and click All Content
2. Search keyword “Aspen Process Manual”, click on the green arrow button.
3. Help file will appear, and you can access the following.
When opening a manual on a specific topic (i.e. Bulk S... |
Problem Statement: Aspen Plus allows to model dynamically vessels undergoing pressure relief due to a fire or heat input specified by the user as mentioned in the following link How to perform a Fire scenario with the Pres Relief analysis. This feature can calculate the vessel wetted area based on the vessel geometry, ... | Solution: For example, the wetted area of the following vessel will be calculated by the cylinder area (Pi*Diameter*Length) and the heads areas.
Note: The tooltip for the head area is "Surface area of a single head". Since the vessel has 2 heads the head area is added twice, so the total area is 339.854 sqft (cylin... |
Problem Statement: Previous to V8.0, when the user creates a profile plot for a column (composition, temperature, etc.), the plot is created as an independent object. Because of this, if the user resets the simulation and/or changes something in the column and re-runs, the old plot stays the same and a new plot is gene... | Solution: This is different in newer versions since by default the plots are automatically updated every time the simulation is re-run. So, if the user resets or changes anything in the column and re-runs, the plots get updated. To compare plots after different runs, please follow these steps:
1. After the first simul... |
Problem Statement: How do I use Aspen Online Modeling (Plant Data) feature to import plant data to my Aspen Hysys flowsheet model? | Solution: This solution provides a training guide and a pre-built example to demonstrate how Plant Data can be used in an Aspen Hysys flowsheet model. The example imports plant data tags from excel and does not require the user to have a connection to a Process Data Server
Keywords: Plant Data, Aspen Hysys, validated m... |
Problem Statement: How do the different License States impact the functionality of aspenONE Process Explorer V8 and higher? | Solution: This knowledge base article describes the various License States for aspenONE Process Explorer V8.x and the impact in functionality for each state.
License Granted: occurs when a license has been granted successfully. In License Granted state:
·aspenONE Process Explorer provides complete functionality.
Lice... |
Problem Statement: What is the meaning of SG_60/60api, SG_H2O60nbs and SG_H2O4? | Solution: In Aspen HYSYS, the user can select different units of Liquid density when a hypothetical is create:
The units SG_60/60api refers to the mass density of a liquid at 60 F over the mass density of water at 60 F (based on API definition).
The units SG_60nbs refers to the mass density of a liquid at 60 F over th... |
Problem Statement: What does the ‘Load Model Once’ option mean in the Aspen Online, Model Specification Options mean? | Solution: When the Aspen Online Engine cycles through the model run, the Windows Service loads the process simulator application before attempting to run the model.
When the option is set to Load Model Once, it means that for the entire time the engine is loaded, the simulator model will be loaded for the case run and ... |
Problem Statement: How do I use Aspen Online Modeling (Plant Data) feature to import plant data to my Aspen Plus flowsheet model? | Solution: The document provides an overview of the Plant Data feature and how it is used in Aspen Plus. The solution includes a workflow presentation and example files to act as a guidance on deploying and validating an Aspen Plus process model using Plant Data
Keywords: Plant Data, validated model, Aspen Plus, Plant d... |
Problem Statement: How to create a filter view for objects? | Solution: This example shows you how to write a KB script to create a filter view in ABE (Aspen Basic Engineering).
ABE allows users to filter objects through specific rules defined in a Filter Module. This Filter Module is a KB script written in VB code. The script will produce an additional filter view in ABE Explo... |
Problem Statement: Aspen DMCplus controller can continue to run with Calibrate/Adaptive Modeling if the key SLM_APC_AM exists in the license file. For v9.0 and later, if this key is missing and the controller has Calibrate/Adaptive feature enabled, it would exit with a "License Configuration Error". | Solution: To keep the Calibrate/Adaptive feature enabled on the controller, it would have to be converted to a DMC3 controller.
To keep the controller as a DMCplus controller, Calibrate/Adaptive needs to be turned off in the controller.
For ACO-based controllers, open up the latest ccf file from the online server. G... |
Problem Statement: How can I achieve the actual field reactor outlet temperature without lowering the inlet temperature to the equilibrium reactor in my model? | Solution:
Engineers tend to want to accurately represent verified variables from the field on a model. This can happen with a reactor, in which the engineer has verified temperatures of both inlet and outlet of 215 °C and 250 °C respectively. Issue arises when the outlet temperature calculated by the program is larger... |
Problem Statement: Surface Jet Pump Unit Operation Extension | Solution: The Surface Jet Pump estimates the performance of liquid surface jet pump (also known as ejector) under a given set of flow conditions, This unit also also indicates the approximate size of the surface jet pump required. This extension does not model multi-phase flow due to its complex nature. This is a thir... |
Problem Statement: How to track the overall composition for the leaving phase and the liquid that stays in a KO Drum | Solution: If the user wants to track the overall composition for the leaving phase and the liquid that stays in a KO Drum, the user can:
For the overall:
Check the composition of the inlet stream in the results tab.
For the vapor phase:
Check the composition of the outlet stream of the KO drum.
For the liquid phase: U... |
Problem Statement: As shown in the attached file, a sensitivity analysis is setup to evaluate the effect the of the packing height (from 1 m to 6 m) for the purity of the distillate, but the mass transfer is not affected. | Solution: The section packed height will not affect the equilibrium if the film resistance is being ignore for both phases, in the Rate Based Setup/Sections tab.
If the user ignores the film resistance, the column will pass from a rate based model to a equilibrium because there isn't any mass transfer resistance and ... |
Problem Statement: I got a result warning 1876: Phase mixing effects for the two liquid phases in stream 1 give an effective viscosity over 50% above the higher of the two individual phase viscosities, in the temperature range... Alternative calculation methods are available. How to troubleshoot? | Solution: When you see this warning message, it means there are two liquid phases formed in the exchanger: oil phase and water phase. The flow is often in the form of an emulsion, which means droplets of one phase are carried along by the flow the dominant, continuous phase. The presence of such droplets can significan... |
Problem Statement: Even when the Depressuring tool is solved, some cells of the profile results are empty (including the peak flow information) | Solution: The cells are empty (including peak flow information) as the default strip chart was modify. So, Aspen HYSYS won't refresh the data in the report as the Depressuring tool uses the information from the default strip chart.
To avoid that, you have two options. The first one, do not modify the default stripchar... |
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