question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: Does the Aspen InfoPlus.21 Mobile application support SSL Encryption (HTTPS protocol)? | Solution: Yes. We recommend that all customers use SSL encryption (https protocol) for any data that is sent over the internet. This certificate needs to be purchased separately from a third party vendor. For more information/Microsoft solutions on how to configure IIS to use the https protocol please refer the Aspen I... |
Problem Statement: What are the uses of a dataset? | Solution: We can use the dataset for three things:
? Interactive Steady State Detection Tuning (in AOD Desktop you can drag and drop the dataset onto the application to initiate the SSD Tuning dialog)
? Trend view of the historical data (in AOD Desktop double-click on the dataset)
? Make an in... |
Problem Statement: If an ACM model uses user provided libraries (the *.acml files), where should the *.acml files be placed such that the ACM model driven by Aspen Online Deployment would be able to access them? | Solution: On the target machine where the ACM model would run, manually place the associated *.acml files in folder C:\Program Files\AspenTech\AMSystem V7.1\Lib
Keywords: acml, library
References: None |
Problem Statement: Using Aspen IP.21 Browser Graphic Studio, a project is published to aspenONE Process Explorer but when viewing a preview image on the Menu Tree in the Process Explorer web site the user is presented with a completely black image:
You also notice that the problem appears to be random, sometimes you se... | Solution: When publishing graphics the Aspen IP.21 Browser Graphic Studio is taking a screen capture for each one. This can go wrong if it is disturbed by switching to another window, etc. This is easily reproduced by opening one of the Aspen demo projects and publishing it to aspenONE Process Explorer but click the mi... |
Problem Statement: Is is possible to use Aspen Framework (AFW)/Aspen Local Security in order to secure Aspen InfoPlus.21 Mobile application? | Solution: No. Aspen InfoPlus.21 Mobile uses its own security model (either Microsoft Windows Active Directory or Windows Local Security) in order to secure access to pages and tags. However we can connect to an Aspen InfoPlus.21 system that uses database security from this mobile application. For more information on ho... |
Problem Statement: When deploying a composite (CLP) application with DMC3 controllers (CCF + MDL3 files), the controller never become active in CLP, but the log files show that the controllers are checking-in into the CLP and the CLP is performing the calculations. However, the results are not implemented by the indivi... | Solution: The root cause of the problem is that CLP at this point does not work with the multi-objective optimization performed by Smart Tune. CLP still uses the traditional single objective optimization and provides the CLP targets, Cost and Cost criterion to the controller variables. However, since the furnace contro... |
Problem Statement: The pack rating section in a RadFrac block is causing this error message:
PRESSURE NOT UPDATED DUE TO PRESSURE DROP CALCULATION ERRORS.
What is the cause of this error? | Solution: The error occurred in the pressure drop correlation, which is based on plots. In some situations, extrapolation has to be used to calculate the pressure drop and the results might be unreliable. Therefore we issue an error message when the "Update section pressure profile" is checked to warn the user. The mes... |
Problem Statement: How to validate the BAD data before input data goes into input calculation module of Aspen Inferential? | Solution: This article describes about the process of validating any bad data as input, before it goes to the input calculation module of Aspen Inferential?
1. Open Aspen Inferential quality (IQ) config -> Right click on Validation folder-> properties
2. Select the inferential name and Input Calculation, in the... |
Problem Statement: After creating a Cim-IO interface to the Zenon OPC UA server, using Cim-IO Test API to attempt to read data from the UA server, it failed with the following error.
Status is 'Request Failed'
Facility=78
Driver Status=1002
or
Status is 'Bad Tag'
Facility=78
Driver Status=1006
The browse path to the UA... | Solution: In order to read data from Zenon OPC UA server in Cim-IO Test API, it is necessary to escape certain characters using the ampersand (&) character.
For the UA tag in questions, the following characters need to be escaped with ampersand character.
· exclamation mark (!)
· dot character (.)
As su... |
Problem Statement: While trying to register the Aspen Process Data COM add-in specifically the file named AspenTech.PME.ExcelAddin.ProcessData.dll using the batch file available with KB 134243 and KB 135431, you may receive the error "RegAsm : error RA0000 : Could not load file or assembly 'Extensibility, Version=7.0.... | Solution: The following folder must be present in order to register the ProcessData.dll: C:/WINDOWS/assembly/GAC/Extensibility/7.0.3300.0__b03f5f7f11d50a3a/
Check to see if it exists by using CD command in a command prompt window:
Alternatively, look for Extensibility using File Explorer. See folder C:\Windows\assembly... |
Problem Statement: How are STCVMAX/STCVMIN linked to STCVDELTA in V7.3.0.3?
In V7.3.0.3, the SmartStep parameter STMLIMLNK became obsolete. It appear that the test limit (STCVMAX/STCVMIN) and operator limits are still linked by the test margin (STCVDELTA), although it is not possible to choose how they are linked anymo... | Solution: Internally, STCVMAX/STCVMIN are set to the same values of UDEPTG/LDEPTG. However, when a step move is calculated, it uses STCVMAX-CVDELTA and STCVMIN+STCVDELTA as the effective CV limits.
Keywords: None
References: None |
Problem Statement: SmartStep 6.0 / 6.0.1 has been installed and the application will not start.
SmartStep manage is started, and it flashes only and does not come up.
User goes to a dos window and navigates to aconline/bin and
attempts to Start the SmartStep from a dos prompt and gets a SmartStep initialization error. | Solution: It has been determined that with some installation, the mpf region creation has not be done completely. If you go to windows explorer and look in the aconline/sys/mpf folder, there should be a smartstep.dir. If this file does not exist, it indicates this is most likely the reason for the application no starti... |
Problem Statement: Variables incorrect marked as critical even though they were not originally set as critical | Solution: The problem shows up only on controllers where the Critical Status Indicator (CRIDEP and CRIIND) parameter is read from a DCS tag. When the communication between APC server and the OPC gets disconnected, the controller is unable to read the CRIDEP from the DCS tags, and therefore it automatically reset this t... |
Problem Statement: Do min/max test moves up/down parameters affect user target changes? | Solution: Yes, the user target move will follow the same constraints as specified by STMVMAXU/D. This means, if the requested target move size is larger than STMVMAXU/D, it will be implemented over sequential cycles.
It may seem that the target move is being reset by the max test move, so that large moves require multi... |
Problem Statement: How can a SmartStep Tester be removed from the Webviewer?
An attempt was made to unload & delete a SmartStep application from SmartStep Tester Manager. It became clear in Manager that the application had been removed, but the Production Control Web Server continued to show the application. Then the u... | Solution: The action to take in this situation is stopping and restarting the dmcp_viewsrv.exe on the DMCplus server. There are batch files in the AspenTech Shared directory, dmcpview_shutdown.bat and dmcpview_startup.bat. Running these batch files and stopping and restarting this process will not disrupt the running a... |
Problem Statement: No Aspen SmartStep Application in Installation List of Products | Solution: You can run our new combined 2006.5 version of SmartStep/DMCplus onlines with only a Aspen SmartStep online license. It will throw you into Aspen SmartStep mode and not let you leave it.
A DMCplus online installation license key is needed to get the combined software installed.
They should already be getting ... |
Problem Statement: Michael Harmse provides this comprehensive document on automated response testing techniques.
His tutorial makes extensive use of examples and illustrates the latest features.
Many examples and usage guidelines are provided. | Solution: Download the attached pdf file (about 9 Mbytes).
Keywords: DMCplus
SmartStep
References: None |
Problem Statement: How to reduce the size of the files produced by PIMS-AO optimization execution. | Solution: There are settings that can reduce the size of the files produced by PIMS-AO run. Note that if all of this output is turned off, some features may be affected. Try to turn options off and then if necessary, specific options can be reactivated to support functionality that is needed.
In the Reporting Set... |
Problem Statement: Depending of network configuration, ports used by CIM-IO need to be assigned to use specific ports numbers. This solution provides step-by-step guide on how to properly assign specific ports number for a CIM-IO for OPC configuration. | Solution: Changes on ports numbers should be done directly on Windows service file on CIM-IO server having related process stopped, to do this:
On InfoPlus.21 Server:
1. Open InfoPlus.21 Administrator and locate the Logical Device record which you wish to change ports number under the CIM-IO node; select it and set the... |
Problem Statement: Can we incorporate component fugacity into adsorption isotherm? | Solution: Aspen Adsorption V9 allows using component fugacity instead of component partial pressure. However, the isotherm type “Partial Pressure� still needs to be selected and Aspen Properties need to be used to supply component fugacity values. To enable this option, please follow:
Gas_Bed > Configure Block > Is... |
Problem Statement: How does changing the number of nodes in adsorption gas bed model affect the simulation? | Solution: Aspen Adsorption gas bed models are spatially discretized. Discretization methods are used to solve the necessary Partial Differential Equations (PDE) across the bed. Larger number of discretization points (number of nodes) will ensure a smaller distance between nodes and hence better accuracy.
By default, th... |
Problem Statement: How to Edit Transforms in APC Builder for Case and Master Model? | Solution: Please note that there are two transform icons in APC Builder and it can get confusing which transform button to use while editing the transform information or even while adding a transform.
Transforms in APC Builder can be added on the case level or to the master model level.
If a case (with a transformed va... |
Problem Statement: What are the steps for linking simulation tags with Aspen InfoPlus.21 from Aspen OTS? | Solution: Refer to the attached word document for step by step instructions including screen shots and descriptions.
Keywords: linl , IP21, Info Plus
References: None |
Problem Statement: After installing the latest version or patch, DMCplus Build shows validation errors that were not found in previous versions. What does this validation look for? | Solution: Recent versions of DMCplus Build enforce a more strict entry and variable validation. This new validation looks for:
- Entries defined in "variable type" collections must be unique across all "variable type" collections (i.e. Independents, Dependents, Test Groups, and Subcontrollers).
- Entries de... |
Problem Statement: Consider a case where CV measurements are calculated as a function of another (user-defined variable) input being read in from the DCS. Ex. the composition (CV) of a product at top of a column is calculated as a function of overhead column temperature (user-defined variable). For such cases, the calc... | Solution: The reason calculated CVs do not change during simulation is because the inputs to these CVs- Temperature and Pressure, which are built as user-defined variables and are read from DCS are not changing during simulation (no inputs coming for these variables from DCS during simulation mode). There are two optio... |
Problem Statement: When upgrading a file from V8.4 to a newer version, the upwards compatibility dialog does not load. How can I upgrade the databanks to the newer version?
Cause
There are two situations where this situation can happen:
1. A file is created in V8.4 and an older databank is manually selected; when... | Solution: The upgrade databanks dialog is active only if the file is using the most current databank of the PUREXX databank. Fore example, in V8.4, the default databank is PURE28, for V9 the default databank would be PURE35
To fix this issue, the users would need to go to Components | Specifications | Enterprise Databa... |
Problem Statement: In the Stream Report, results are reported with only 8 significant figures. However, in some cases, higher precision is required. Is it possible to increase the precision in the results? | Solution: The stream report has a limit on the amount of significant figures that can be reported. Adding more than 8 significant numbers would only complete the values with zeros in V8.8 and earlier.
To increase the precision of the results in the report in V8.8 and earlier, users can:
· Select a large unit fo... |
Problem Statement: How do you globally define a new Template for the Stream Results? I have created a new Template for my stream results. How do I get it used for all streams forms that I open? | Solution: Go to the File Options Advanced page. You can Change the Default template for the Stream results summary.
Note that if a form has already been opened, it will continue use that template when re-opened.
Keywords: Stream Results
References: None |
Problem Statement: How can you identify which the a particular file has been created from the version incompatibility error message?
For example, to what version does the message "This file was created with newer version (23.0) of Aspen Plus and is not compatible with the current version (21.0)" refer. These versions a... | Solution: The dialog show when selecting "About Aspen Plus" from the Help menu indicates the Aspen Plus version.
You can refer to table below to find out associated version number used in the messages.
Aspen Plus version
Help About Version Number
2004.1
13
2006
20
2006.5
21
V7.0
22
V7.1
23
V7.2
24
V7.3
25
V7.3.... |
Problem Statement: How do I report mass specific heat for the total stream & its phases and get this reported for all streams? | Solution: Additional properties can be added using Select Properties with the new Stream Summary.
For example, open a file and run.
1. Go to the Result Summary | Streams form.
2. In the Property Sets section of the Stream Summary ribbon, click on Select Properties or scroll to the bottom of the Streams Materi... |
Problem Statement: In the new V9 interface, how do I add vapor pressure to the stream report? | Solution: To add vapor pressure in stream reports, follow these steps:
1. Go to Results Summary | Streams.
2. At the bottom of this table please click on Add Properties.
3. Look for Vapor Pressure (will show by component) and Bubble Point Pressure (for the mixture).
4. Once the properties are shown save... |
Problem Statement: I have downloaded the latest compilers.cfg file and the configuration is "OK"; however, I am still not able to compile and link my subroutines using Intel Visual Fortran 2016 and Visual Studio 2015 or Visual Studio Express 2015. | Solution: By default, the Visual Studio 2015 and Visual Studio Community 2015 do NOT install Visual C++ (and associated tools). You now have to select the Custom installation option and then check Visual C++ under Programming Languages.
The documentation now mentions that Aspen Plus needs the Visual C++ and the assoc... |
Problem Statement: When I modify the stream summary and click on Send to flowsheet, table displays the default format for the stream summary. How can I keep the changes I made? | Solution: In Aspen Plus V9, in order to maintain modifications to the Stream Summary you need to save two things:
1. Template - Templates control which data is displayed and how it is displayed. If you add or remove properties, or if you change the order, you are modifying the template, which means to keep the chan... |
Problem Statement: The Data Specification dialog in the Aspen Production Record Manager Get Production Record Data COM Add-in function is used to add columns (such as characteristics, statistics, etc...) to display in the results set.
The dialog provides the option to use Cell | Solution: The above error message is received due to a limitation on a number of characters allowed in the array. The limit is 132 characters.
A workaround is to use an array with only a few items whose total character count doesn't exceed 132 characters.
This issue will be addressed in a future release of the APRM Add... |
Problem Statement: This knowledge base article describes the methods to control the geometry of the Gantt display. | Solution: You can control the following geometry of the Gantt display:
1. Facility Height.
2. Blank Space on top of Facility.
3. Width of the Facility Header
Method 1:
Using the below options in the CNTLS table:
1. FACHT - Facility Height
You can enter the number of pixels for facility height for draw... |
Problem Statement: This knowledge base article describes the use of WHILE in Rules. | Solution: WHILE is used in Rules to loop though a logic for a fixed number of times or until some condition is met. The WHILE statement uses a local variable as a counter and increments its value with each iteration.
Breaking a WHILE loop occurs when the maximum number of iterations specified in the CNTLE is encountere... |
Problem Statement: This knowledge base article describes how to configure a Scroll View in XML. | Solution: The ScrollView is a view configuration that is used to scroll the content vertically or horizontally.
Syntax:
<ScrollView
Type = “ScrollView�
VerticalScrollbar = “Visible�
HorizontalScrollbar = “Visible�
>
Settings Description:
· Vertical Scrollbar:  Controls the visibility of the verti... |
Problem Statement: Installation of Aspen IQ Model Powertools 1.3 generates a message indicating that Aspen IQ Desktop is required. Aspen IQ Desktop 3.1 has already been installed and is present.
This is a known bug. | Solution: Uninstall the Aspen IQ Desktop 3.1 software and re-install with the Aspen IQ Model Powertools.
KeyWords:
Aspen IQ
Powertools
Aspen IQ Model
Keywords: None
References: None |
Problem Statement: Does the new BLOWDOWN®  tool in Hysys need the Dynamics license? | Solution: The BLOWDOWN® simulator that has been incorporated into Hysys since V9.0 will need the dynamic license for it to be loaded and run in Hysys.
Keywords: BLOWDOWN®, Dynamics, License
References: None |
Problem Statement: Why I can see following “Unable to load project� error message when I am trying to import Aspen Plus backup (bkp) file in Aspen Process Economic Analyzer(APEA)? | Solution: We have implemented to import Aspen Plus backup(bkp) file to Aspen Process Economic Analyzer(APEA) from V9 onwards.
This error you are getting is due to version compatibility issue. You cannot import older versions Aspen Plus backup(bkp) file to Aspen Process Economic Analyzer V9. In order to remove this erro... |
Problem Statement: When I import Aspen Plus backup(bkp) file to Aspen Process Economic Analyzer(APEA), does it require extra Aspen Plus tokens? | Solution: We have implemented to import Aspen Plus backup(bkp) file to Aspen Process Economic Analyzer(APEA) from V9 onwards. In previous versions of Aspen Process Economic Analyzer(APEA) we can able to import Aspen Plus document(apw) and compound(apwz) files which may lead to consumption of extra Aspen Plus tokens as ... |
Problem Statement: What database versions are supported in Aspen Fleet Optimizer V9.0? | Solution: Aspen Fleet Optimizer V9.0 operates with Windows Server 2008 R2 SP1 and Windows Server 2012 R2. Aspen Fleet Optimizer V9.0 does not support earlier versions. Aspen Fleet Optimizer V9.0 operates with Oracle 11g (11.2.0.4) and Oracle 12c (12.1.0.2). Aspen Fleet Optimizer V9.0 allows supports MS SQL Server 2008 ... |
Problem Statement: Why is there an increase in the Production Control Web Server (PCWS) IIS log files in V8.8 and later releases? | Solution: Starting V8.8, the web server IIS log files increased. This is a by-design behavior. The reason why this is seen in V8.8 (and later releases) is that PCWS began performing a full rebuild of the secured asset permissions when the cache refresh happens. This fixed an issue with the web interface not being able ... |
Problem Statement: PIMS Silent upgrade receives message "The Aspen mMDM adapter component will be removed as part of this uninstall. Please make a backup copy of the following files before continuing if you have modified the default adapter’s configurations" | Solution: If Aspen mMDM adapter component has been installed and XML files were modified by an AspenTech application, then users will get this error message asking to backup these files. This message occurs during a Silent uninstall of the mMDM adapter component or during a silent upgrade of the mMDM adapter component.... |
Problem Statement: How do I impose turndown capacities for process units? Please note that this is not Min capacity. The program should able to take select the value of capacity between minimum and maximum or the unit capacity should be zero. | Solution: The solution for your problem is to use Mixed Integer Programming. Table MIP allows the user to define the threshold variables through the columns LBD and UBD.
A variable that represents the capacity of the unit needs to be used in table MIP to impose the threshold bounds.
For example let us consider the exam... |
Problem Statement: Error "unknown map for event data type", while restarting Aspen InfoPlus 21 repository. How do I resolve? | Solution: This solution article describes about steps to perform in case the Aspen InfoPlus 21 archiving stops. The repository will stop and color will be red.
The error displayed will be "unknown map for event data type" in error.log file located in the repository folder (C:\ProgramData\AspenTech\InfoPlus.21\c21\h21\"... |
Problem Statement: How to resize an undersized valve | Solution: In Aspen Plus, when the valve design option is selected, with either the outlet pressure or pressure drop specified, choking flow can occur.
When choking is predicted, the design method ignores the effect of choking, resulting in an under-estimate of the valve % opening. When the simulation is exported in... |
Problem Statement: How is the Heater block modeled for reverse flow? | Solution: The pressure drop in the heater is related to the outlet volumetric flow rate by:
ΔP = K x Rho x FV_out2
Where:
K = A constant determined by fitting to steady-state conditions
ΔP = Pressure drop
Rho = Mass density at outlet conditions
Fv_out = Outlet volumetric flow rate
If the steady-state simula... |
Problem Statement: What is model cleanup and how do I use it? | Solution: PIMS provides a feature called model cleanup that allows the user to quickly purge unnecessary files that have been generated by prior model runs.
The cleanup function can be accessed by the icon or through the menu MODEL | CleanUp Model(s). Once activated, the model selection dialog box will open. This allow... |
Problem Statement: Web.21 comes with MS FrontPage add-ins which can be used to generate custom Web.21 asp pages. This article describes the process to use the Web.21 add-ins with MS FrontPage.
Note: The Web.21 add-ins are installed with the Web.21 Graphic Studio. | Solution: In FrontPage, click on the 'New Web.21 ASP File' button. This will add a Web.21 header to the top of the web page.
Place your datapoint fields, APEx trend plot objects, etc. on the web page by clicking on the specific Web.21 object button in FrontPage. Double click on the object and configure the datasource ... |
Problem Statement: Most fields in a Point Detail (Detail Display) page are configured to allow users to write directly to the IP.21 database unless:
IP.21 security has been implemented and
Users are limited to "Read" access on the record.
Even if users have "Write" access, it could be desirable to limit the specific fi... | Solution: Modified Point Detail pages for IP_Analog, IP_Discrete and PMC records are attached to this solution. Separate sets of the files (IPAnalog.asp, IPDscret.asp, PMCAna.asp and PMCDisc.asp) have been created for versions 6.0.x and 2004.x. These modified pages provide read-only access to record information and pre... |
Problem Statement: In the specific situation when a client who wants to use Aspen IP.21 Process Browser (formerly known as Aspen Web.21) does not have Aspen Process Explorer (APEX) installed and does not have permission to download ActiveX controls, a prompt to download the Web21Controls.cab will occur each time Aspen ... | Solution: Although Aspen IP.21 Process Browser graphics are Java class, ActiveX control is still required since Aspen Process Data, Timeline control and other APEX middleware are used with Graphic plots.
On client machines that are set to disable ActiveX downloads, Aspentech recommends that the CAB file components be i... |
Problem Statement: Where can I find more information about the Tray/Packing type used in Aspen HYSYS Column Internals? | Solution: For sizing and rating calculations, Aspen HYSYS Column Analysis tool divides a column into multiple sections. Each section can have a different tray type, packing type, and diameter.
In the column internals, you can choose from the following five commonly-used tray types:
Tray type
Vendor Site
Sieve
Bubble ... |
Problem Statement: Can I model a slide valve in a compressor within Aspen HYSYS? | Solution: No unit operation in Aspen HYSYS can directly model a Slide valve.
The workaround is to manipulate the Suction volume to mimic the effect of slide valve which can
control the suction gas volume of compressor.
Â
Keywords: Slide Valve , Suction Volume, Screw compressor
References: None |
Problem Statement: Overview of Software License Manager (SLM) Server changes from aspenONE versions V7.3 through V9.0 | Solution: The table below provides the major enhancements and bug fixes that were included in each of the Software License Manager (SLM) Server releases from 8.4 through 8.6.1 that correspond to aspenONE versions V7.3 to V9.0
SLM Server Version
aspenONE version
Major Enhancements and Bug Fixes
8.4
V7.3, V8.0, V8.1, V... |
Problem Statement: How can one prevent Aspen IP.21 Process Browser (formerly Aspen Web.21) from prompting the users for credentials? | Solution: When a user navigates to the home page for Aspen IP.21 Process Browser they may be presented with a request for their credentials. To prevent the request, make an adjustment to the Microsoft Internet Explorer (IE) Security Settings to be either of the following:
Automatic logon only in Intranet Zone
Autom... |
Problem Statement: What units are available in the PSV Sizing tool in Aspen HYSYS? | Solution: In the Safety Environment of Aspen HYSYS, reports are available in both metric and English units. Please refer to F1 help for further information.
Note that in versions prior to Aspen HYSYS V9.0, some reports would only export to Excel in metric units. This has been resolved in Aspen HYSYS V9.0
To request a... |
Problem Statement: Is there a way to change the standard orifice sizes for a PSV? | Solution: In the Aspen HYSYS Safety Analysis Environment, the flange sizes in the Line Sizing tab, are populated according to the American Petroleum Institute (API) standard guidance table. However, they do not cover all the valve sizes used in the industry.
In such cases, you can now (starting in Aspen HYSYS V9.0) use... |
Problem Statement: How is the Relieving Pressure calculated in the Safety Analysis Environment of Aspen HYSYS? | Solution: Relieving pressure is calculated as the set pressure plus allowable overpressure.
where
is the calculated relief pressure
is the set pressure
is the overpressure
You can view the details of the calculation by clicking on the Edit button which is next the relieving pressure value in the Scenario Setup in order... |
Problem Statement: Does the Fire Scenario in the Safety Environment of Aspen HYSYS calculate the latent heat? | Solution: Starting in Aspen HYSYS V8.6, the PSV Sizing capability offers a latent heat calculation. Once an initial % vaporized and final % vaporized are specified in the fire scenario, the PSV Sizing capability will estimate a latent heat value based on the energy required to take the
Keywords: PSV sizing, latent heat... |
Problem Statement: How can I put the solver on hold or activate it via automation? | Solution: To put the solver on Active or On Hold:
You can use the property .CanSolve of the solver object.
Attached you will find an example Excel spreadsheet. Any simulation has to be active (open) for this Excel spreadhseet to work.
Keywords: OLE, macro, VBA
References: None |
Problem Statement: How do I use the Stream Property Spec of a non-draw stream as a Column Specification? | Solution: The stream property spec of a non-draw stream in a column is not available directly. However, using this workaround we can specify the non-draw property spec as a specification:
1. Enter the column subflowsheet
2. Double click on the tower and go to Design | Side Draws, create a side draw stream and s... |
Problem Statement: How to resolve the OLE Registration Unsuccessful pop-up message which occurs while using Set Version in Aspen HYSYS | Solution: To resolve this, Select Set Version in Aspen HYSYS >Right Click > “Run as administrator".
The OLE Registration will then be successful.
KeyWords
Set Version, OLE
Keywords: None
References: None |
Problem Statement: How to install the missing DMCplus context service if its missing after installation without a reinstall of entire Aspen APC Suite? | Solution: If DMCplus context service is missing and all the other services are present then it indicates that the installation is faulty and it failed to install some components.
Verify if all the other Aspen APC offline tools work correctly. If the issue is only with the DMCplus Context service, which prevents from ... |
Problem Statement: Column Hydraulics - Detailed Internal Method? | Solution: In response to your query for K value calculation in column environment, please find the response below.
A. The Use Tower Diameter Method is a simple heuristic in which k is assumed proportional to the column diameter squared.
Originally, in the attached case file, k= 18 [kg/sec/sqrt(kPa-kg/m3)] at D= 5.79m. ... |
Problem Statement: How can I make visible the Filters and Folders tree views in Explorer? | Solution: You can hide and show the Filters and Folders widnows in Explorer by going to View tab and unchecking/checking the Folder tree view and Filter tree view
Keywords: filters, folders, Explorer
References: None |
Problem Statement: Users may notice that in the Results | Pressure/Flow Summary window a Friction factor is reported, but it does not state whether it is the Fanning friction factor or the Moody friction factor. Since it is an important parameter for pressure drop calculations, it is needed to know exactly what this re... | Solution: The Friction factor reported by Aspen Flare System Analyzer (AFSA) on the Results | Pressure/Flow Summary window is the Moody friction factor ().
For example, consider a pipe transporting complete vapor, for which the following information is reported:
- Friction Factor = 0.012
- Reynolds number (... |
Problem Statement: How can we quantify the Reliability of a Series system and a Parallel system? | Solution: Series System
· Consists of multiple components
· Failure of 1 component results in the corresponding system failure
· System Reliability is the product of the component Reliabilities
Overall Reliability (Rs) for a Series System:
Rs = R1 * R2 * R3
where, R1, R2 and R3 are the indi... |
Problem Statement: Briefly overview the different statistical distribution types available in AFR. | Solution: Current statistical data distribution types available in AFR are as follows:
- Exponential
· The most commonly used distribution
· Constant Failure Rate (probability of failure is the same in the first 100 hours as it is in the period 10,000-10,100 hours)
· 63.21% of all values fa... |
Problem Statement: What is the significance of Available Capacity, Mechanical Capacity, Max Capacity, Set Capacity and Utilized Capacity in AFR? | Solution: Available Capacity
This is the ability of the unit to produce based on both the mechanical states (mechup) and operational states (opup) of components comprising the model. This is a READ ONLY PROPERTY.
Mechanical Capacity
This is the ability of the unit to produce based only on the mechanical states (mechup)... |
Problem Statement: What are the Port and communication protocols with AtOMS and AORA Client to connect with Server? | Solution: · Both AtOMS and AORA using Microsoft ODBC / UDL to connect with Server application.
· So, in principle, Microsoft ODBC Standards are used by AtOMS and AORA.
Please refer below link from Microsoft for their PORT (ANSWER: 1433) and communication protocols (ANSWER:TCP)
https://msdn.microsoft.... |
Problem Statement: How to resolve security issues with User Login in AtOMS ? | Solution: To resolve the problem, with user log-in , please try the following.
1. Log-in with the user , for example “John”, on the specific machine
2. Go to windows services, and restart “AFW Client Security Service”.
3. After restart, please try to launch AtOMS Client with correct users profile, in ... |
Problem Statement: Why do I get an error " You do not have permission to login. " when using MOC? | Solution: When connecting to the MOC client you are prompted with a logon window and when you enter your usernmane and password you may receive the message
To resolve this issue you will need to check the following configuration steps needed for a user to authenticate
1. Check to make sure that the user has b... |
Problem Statement: When I switch to Dynamics mode (from Steady State), and start my integrator, my tank level immediately jumps to 100%. Why? | Solution: In Steady State mode, HYSYS ignores any holdup (or liquid level) related information because this is irrelevant to the steady state mass balance. Upon switching to Dynamics mode, HYSYS will flash the tank inventory. If in steady state the tank feed was subcooled (or saturated) liquid only, there will be a liq... |
Problem Statement: When I reduce the efficiency on my column top stage, I get a consistency error. Why? | Solution: The issue relates to the vapour fraction value in certain chemical systems. The error arises in columns without a condenser (or at least a condenser located in the column subflowsheet). A low column top stage efficiency can result in liquid being carried over (in the vapour) in the overhead 'vapour' stream. ... |
Problem Statement: How to perform collinearity analysis in DMC3 Builder V9.0? | Solution: Download the attached pdf document which contains a tutorial on how to perform collinearity analysis in DMC3 Builder V9.0.
Also attached is a dataset .clc file and a model .mdl file which were used for the example provided in the tutorial.
Keywords: DMC3
Constrained Identification
Mass balance
References: Non... |
Problem Statement: Do properties added to the Stream Results table in Aspen Plus V9 automatically appear in aspenONE? | Solution: aspenONE Web application is used to easily share Aspen Plus and Aspen HYSYS models and compare with actual plant data, side-by-side. This is why is really useful to report specific properties using tables.
If user customizes Stream Results table in Aspen Plus V9 and wants to see the same in aspenONE, user n... |
Problem Statement: Why can I see the following error when I create a user-defined utility and attach it to a HeatX block?
ERROR WHILE CHECKING INPUT SPECIFICATIONS BLOCK NAME: HX MODEL NAME: HEATX STATE VARIABLES MUST BE SPECIFIED IN A UTILITY REFERENCED BY A HEATX BLOCK | Solution: In Aspen Plus, the state variables are temperature, pressure, and vapor fraction. It is mandatory to define the state variable in the material stream. Although you have defined this Utility as type General (User Defined) and specified heating and cooling values, you will get this error until you have specifi... |
Problem Statement: I have two reactor vessels that are linked to PFD vessel objects. I want to switch the vessels which link to PFD objects without redrawing both PFD objects. I made this by switching the item number on Nozzle sheet Datasheet.
Right now, they are switched but the nozzles on the sketch for Vessel 1 show... | Solution: Nozzles can be switched between vessel objects following the below procedure:
1. Go to ABE Explorer, and display vessel attributes. Then remove all nozzles as shown below.
2. Display the attributes of the other vessel and remove all nozzles as above.
3. Next, insert existing Item on Nozzles, select the nozz... |
Problem Statement: :
How-to-export-stripchart-historical-data-to-a-csv-file? | Solution: 1) Go to the Dynamics menu and select Stripcharts
2) Select the Stripchart you would like to see the data
3) Click Edit
4) Select the tab Historical
5) Click Save to .CSV File
Keywords: csv, historical, stripchart
References: None |
Problem Statement: My calculated pump efficiency is above 100% - what could be causing this? | Solution: Such a situation usually occurs when pump curve(s) have been input. The user would have input efficiency / flow data for the generation of the pump curve. On the flowsheet, if the flow input value to the pump (possibly calculated from an upstream unit operation) is outside of the flow data range, HYSYS will e... |
Problem Statement: Why do I see less sulfur conversions in the Thermal Stage result in the Performance Summary compare to the results in the Furnace, as shown below: | Solution: User may see this difference if the "Allow simulation of back-reactions in the WHE" is checked in the Waste Heat Exchanger in the thermal stage, as shown below:
By default, the Allow simulation of back-reactions in the WHE check box is selected; you can clear it if desired. Various reactions occur in a typica... |
Problem Statement: How to model a Rupture Disk in Aspen HYSYS Dynamics | Solution: There is no unit operation available to model a rupture disc, however you can use a relief valve instead. In general, you should follow the procedure below to set up a rupture disc:
Add a Relief valve from the Object palette
Specify in Design | Parameters the Set Pressure and Full Open Pressure. These values ... |
Problem Statement: How can I identify whether my current license file has the option to commute? | Solution: In order to identify whether a license file is commutable, you must check the license file and confirm whether commuting is enabled. Only network based license files will have the commuting option.
1. To check whether the license file is commutable,
please navigate to Windows Start > All Programs> AspenTe... |
Problem Statement: How do I obtain the vapour and liquid phase enthalpies in the performance page of the Heater Block? | Solution: The Heater Block in Aspen HYSYS only gives the enthalpy for the overall phase in the Performance page. If the user requires the enthalpies for the individual phases then the Properties Table available in Stream Analysis can be used. Follow the procedure given below to generate the enthalpy plots for the indiv... |
Problem Statement: How to simulate compressor settle-out in Aspen HYSYS Dynamics? | Solution: Compressor settle-out is the differential pressure drop that results in a compressor trip at the maximum pressure increase across it. A compressor trip or shutdown occurs in the event of various alarm conditions. Some examples include high vibrations in the compressor or loss of lube oil in the compressor. Du... |
Problem Statement: Natural gas hydrates are solid crystalline assembles snow. Its formation is usually caused by presence of "free" water, low temperature, and high pressure. The presence of H2S and CO2 also promotes formation of hydrates. Hydrate formation is rapid and the plugged pipeline can be costly to clean up. T... | Solution: Using the Aspen Hydraulics and Aspen HYSYS to:
· Determine the potential location of hydrate formation
· Investigate the methods of mitigation:
o Thermal Insulation
o Injection of hydrate inhibitor
· Optimizing the inhibitor injection rate
You will learn to:
· Leverage hy... |
Problem Statement: When browsing SQLplus Reporting (http://<serverName>/sqlplus), the Section Type, buttons, etc. are shown as blank. | Solution: This is due to missing registry entries in the server on which SQLplus Reporting is installed. Perform the following steps to resolve the issue.
Open Windows Registry Editor by entering regedit in Run dialog box.
Browse to the registry entry HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AspenTech\InfoPlus.21. If it... |
Problem Statement: How to add an Excel spreadsheet into a datasheet sketch field without extra rows/columns? | Solution: When adding an Excel spreadsheet into a datasheet sketch field, it will be shown with either extra rows or columns if previous formatting has been applied to such spreadsheet and deleted with the 'Clear' option in Excel.
So, to successfully embed a spreadsheet into a sketch field keeping the user defined ... |
Problem Statement: How is the expander Mafi-Trench efficiency modeled in Aspen HYSYS? | Solution: The Mafi-Trench curve correlates the isentropic efficiency with the ratio of the expander tip speed over the stage isentropic enthalpy change. Atlas Copco uses a similar approach.
Aspen HYSYS models the expander’s Mafi-Trench efficiency using the method based on the curve approach proposed by the Mafi-Trench ... |
Problem Statement: When trying to generate a procedure code from Tools | Generate procedure code, the following error message is issued: ‘No suitable version of Visual Studio was found’ appears:
ACM v9 only supports Microsoft Visual Studio C++ 2013. No other versions are supported. Is it possible to use Visual S... | Solution: ACM v9 searches for the environment variable VS120COMNTOOLS, which is created when you install Visual Studion 2013. This variable is the path to the installation of Visual Studio (C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\Tools\).
To use Visual Studio 2015 with ACM v9, create a new system ... |
Problem Statement: Aspen Calc GUI provides ways to export calculation as XML files which can be useful to move calculations to a new server, share the calculation with other users or simple have a backup of the calculation. However, the Aspen Calc GUI just allows the creation of a single XML file at a time. This soluti... | Solution: Copy the query below to the Aspen SQLplus query writer-
local calccmd, CalcName, Calculation, CalcFolderName, GroupName, XmlCalcsPath char(255);
calccmd = CreateObject('CalcScheduler.CalcCommands');
CalcFolderName = 'TestFolder' --Change folder name as needed
XmlCalcsPath = 'C:\Temp\' --Change this for a k... |
Problem Statement: In rare instances the Aspen IP.21 Process Browser controls do not install automatically when a client is prompted to download and install them and the following error message may be returned:
Component download/registration failed! - Please check your registry/security settings | Solution: Firstly since this is a thin client you will need to download the AtWebControls.cab files from the IP.21 Process Browser Server. Default location for this file is c:\Inetpub\wwwroot\AspenTech\AspenCUI\
1. Download this file to the client machine as well as the AtWebControlsThinClient.zip file attached to thi... |
Problem Statement: Control Valve Failure: Dynamic Gas Blow-by | Solution: Disclaimer: This article and the example provided is for instructive purposes only. Any model calculations and methodologies should be verified depending on your specific regional and/or project requirements.
This Aspen HYSYS Dynamics example covers how to model the effects of gas blowby resulting from a cont... |
Problem Statement: When trying to connect to Aspen InfoPlus.21 database in Aspen Tag Browser, the status bar is showing error as per below screenshot. | Solution: The Aspen Tag Browser depends on the AspenTech SQLplus ODBC driver to connect to the Aspen InfoPlus.21 database. The above is due to missing registry entry for the Aspen SQLplus ODBC driver.
To resolve this issue,
1) Launch Windows Registry Editor.
2) Browse to HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\ODBC\OD... |
Problem Statement: How is the viscosity for hypocomponents calculated? | Solution: To calculate the viscosity for a hypocomponent, the expressions below are used:
z = exp( exp( A + B * log ( T * 1.8 ) ) ) - 0.7
x = ( -0.7487 - 3.295 * z + 0.6119 * z^2 - 0.3193 * z^3 )
visc = ( z - exp( x ) ) * dens * MW / 1000
where,
dens = gmol/L
T = K
About Coefficients A and B, HYSYS uses the following ... |
Problem Statement: How can I use the homotopy tool in Aspen Custom Modeller? | Solution: Homotopy provides a way of moving from one converged solution to another solution with different values for one or more of the homotopy variables. It is a useful technique where it is difficult to obtain convergence for a particular specification, but where you already have a converged solution for a differen... |
Problem Statement: In the Pipe Segment ‘Slug Tool Results ‘, what are the implications when the frequency indicates Min or Max? | Solution: The slug tool evaluates slug flow characteristics at a given slug frequency. This slug frequency is either a User Specified value or as calculated by Hill & Wood correlation in the Slug Tool Frequency Options.
The slug tool result table displays slug properties (lengths, velocity, holdup, pressure gradient et... |
Problem Statement: Is it Possible to Control Heating/Cooling Medium Level in Shell Side of Heatx Block? | Solution: A slight workaround is needed. The attached zip is a V9 example with boiling propane cooling down hot oil. In this model, dynamics for the heat exchanger with nominal inlet and outlet volumes of 1m3, and sent to pressure driven AD. AD models the dynamic heatx as a volume followed by an instantaneous heat exch... |
Problem Statement: The ‘Go to Parent’ flowsheet in the Flowsheet/Modify tab appears disabled for certain files when the following workflow is performed:
1-Access sub-flowsheet in simulation environment
2-Change to Safety Analysis, then back to simulation environment (where sub flowsheet is still displayed).
3-If user ... | Solution: Instead of using the (now disabled) ‘Go to parent’ function, choose to display flowsheet in the View tab. This takes the user back to the main (parent) flowsheet.
Keywords: Safety Analysis, Simulation, Sub-Flowsheet, Parent Flowsheet
References: None |
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