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Problem Statement: There are several reasons why an Aspen InfoPlus.21 database can save values from an Aspen CIM-IO interface with a timestamp different than expected. These can be related to application settings or Windows server configurations. This solution provides general troubleshooting tips to verify timestamps. | Solution: 1. Identify the timestamp source. First thing to check is the source of a timestamp. The timestamp for a value retrieved by an Aspen CIM-IO interface can be set by two different sources: the CIM-IO server (interface) or the CIM-IO client (database). In both cases, the timestamp is defined when the value is re... |
Problem Statement: An pfwauthz.asp failure error can sometimes be issued after Business Process Explorer (BPE) or Aspen Security Manager is started. In some cases, the text within the error box may be formated for a browser in html format. As an example, the following error message may be issued within an Error Dialog ... | Solution: The Aspen Framework Business Process Explorer (BPE) and Aspen Security Manager both interface with Security Server. For example, when a person logs into BPE or the Aspen Security Manager, both of these applications query the Security Server to determine role membership. The client interface for the Security S... |
Problem Statement: Which solution is used to create the XNLP_ | Solution: .dat file when running multistart?
Solution
When you run multistart PIMS creates an XLR solution file for each run. There is a tolerance that determines if a solution is unique or sufficiently different from previous unique solutions. The first instance of that unique solution (objective function value) wi... |
Problem Statement: Edit Calculations Call doesn't work
When calling the Edit Calculation in the Process Controller Workspace, the following error is generated
Error on Edit Calculations
An entry with the same key already exists.
Steps to get to this error.
Open Process Controller Builder
Generate new Application or... | Solution: This behavior occurs when you have Multiple Formula Libraries defined in Aspen Calc and some with a duplicate Formula name. (e.g. Lib1 has XX and Lib2 also has formula XX). The solution will be to rename the offending Formula name. Formula names must be unique across all formula libraries.
Keywords:
Referenc... |
Problem Statement: What is the syntax, when using Test-API, for looking at information in the RTO Context? | Solution: It’s <ProjectName>|<Variable>|VALUE
e.g. C2P2|AI411B.PV|VALUE
Keywords: Test API, APC, RTO, Watch, Context,
References: None |
Problem Statement: When connecting to Role based Visualization OpsNav and using network monitoring tools or Internet explorer Debug you will notice high amounts of of network traffic. | Solution: When using the OpcNav tooly see large in RBV you ma amounts of network traffic. For example using the Internet Explorer Debut tool (F12) and selecting 'Network' tab you can monitor the traffic and will see the requests below.
This may generate large amounts of unwanted traffic. To resolve this issue follow ... |
Problem Statement: Both Local Security and Aspen Framework utilize the AFWDB database. This document summarizes server-side configurations that can cause Aspen Framework components to fail when opening a connection to this database.
AFWDB connection problems will surface during the Afw Security Manager login process wh... | Solution: All AFWDB database transactions are performed under a local database user account. Both the account and password are defined within the database management system for the AFWDB database and must be registered using the Data Source Configuration Tool. This tool, which is activated from the Start Menu, writes... |
Problem Statement: The on-line help describes the Ideal Adsorbed | Solution: Theory, but it would help to have a working set of equations to see exactly how this works.
Solution
The purpose of the Ideal Adsorbed Solution theory (IAS) is to be able to predict the multi-components isotherm from the pure component isotherms.
The models of Aspen Adsorption library are private and theref... |
Problem Statement: If a miscellaneous tag that belongs to an existing tag group is added to a new tag group all the existing KPIs for that miscellaneous tag within the existing group gets deleted. This solution describes how you can view those KPIs under new tag group | Solution: When a miscellaneous tag is assigned to a tag group, the KPIs for that tag is automatically assigned to that tag group. If the same tag is then added to the another tag group in AspenWatch Maker, the existing KPIs will be removed from the system and a new set of KPIs will be built and assigned to the new ta... |
Problem Statement: This knowledge base article explains how to remove the AtWebControl Cab file on Windows Server 2012. | Solution: Please download and review the following attachment:
Steps_to_remove_AtWebControl_Cab_file.pdf
which contains step-by-step instructions supported by screen captures.
Keywords: None
References: None |
Problem Statement: Is it possible to import Excel data in to PID Watch? | Solution: It is not possible to directly import Excel data into PID Watch. However, a work around does exist to convert Excel Data into vector files that can be imported into PID Watch.
1. Convert Excel data into a TXT file based on the information given in solution 136619.
2. Import TXT file into APC Bui... |
Problem Statement: The aspenONE installer prevents installation of aspenONE claiming the user is not an administrator on the machine. After selecting aspenONE and entering user credentials, an error message, similar to the following, is displayed and the installation cannot proceed:
Error: ABCorp\a1admin is not an adm... | Solution: The check for whether the user is an administrator is case sensitive. The workaround is to log out and log back in using the same alphabetic case as stored in the system.To find how the account is stored in the system:
· Open Control Panel
· Select Administrative Tools\Computer Management
... |
Problem Statement: APC Builder/DMCplus equivalent Entry Look-up table. | Solution: The attached excel document provides a one stop location to determine search/look-up the equivalent APC Builder entry for a known DMCplus parameter name and visa versa. For example, VINDSP in DMCplus corresponds to Setpoint in APC Builder. The instructions on how to use the look-up table are provided in the E... |
Problem Statement: What is the equivalent of the NEWPV parameters in the APC Builder interface? | Solution: Users in traditional DMCplus controllers had the option of using the NEWPV parameter of an intermittent Controlled Variable (CV) in order to indicate to the engine about the availability of a new measurement for the variable. While all intermittent CVs in new APC Builder environment also have a NewPV entry, t... |
Problem Statement: How to change Time to Steady State (TTSS) of a controller in APC Builder? | Solution: There is no direct procedure available to change the TTSS in the master model or in the Model identification platform.
This setting is available in the APC Workspace area by using Edit + Model coefficients to change the TTSS.
Please remember that, Time to Steady State = Number of Model Coefficients * Contro... |
Problem Statement: How can you delete a variable from Aspen Simulation Workbook (ASW) table? | Solution: If you want to delete a variable from the ASW table. Please follow the steps below.
1.Right click on the variable you wish to delete.
2.Go to the Simulation Workbook Tables
3. Then select Delete Variable from table.
Please note that by just deleting the row (like in Excel functionality) wont delete the link w... |
Problem Statement: Why does the error “Sharing add-in for Microsoft lync 2010” appear when ASW is used ?
Due to insufficient access privileges, the registry entry for the following add-in could not be written:
Sharing add-in for Microsoft Lync 2010
Try running this program as Administrator. | Solution: In the programs menu the right version of ASW should be selected
Start | All Programs | Aspentech | Process Modelling V*.* | Aspen Simulation Workbook | Aspen Excel Add-In manager.
After selecting the right version of ASW the next step is to uncheck the Microsoft Lync from the Add-in list by clicking File | o... |
Problem Statement: What is the purpose of Aspen Adaptive Modeling Test Agent? | Solution: Test Agent is the tool that continuously monitors the progress of step-testing activities and reports back any issues detected in a timely fashion. Test Agent also serves as an entry point and workflow guide for the Adaptive Modeling features.
The Test Agent schedule dialog box is used to configure and contro... |
Problem Statement: When optimizing blend oil using Aspen Orion XT, there appears to be a problem in the product functionality. The detail steps to reproduce this behavior are below:
? In the Optimize Blend Dialog Box, press the "Optimization Tab" button,and select the "Excluded Heel" field. Then there appears t... | Solution: Aspen Orion XT is working as designed. Click the option "Exclude Heel" from Optimize Blend Dialog Box, you are excluding the heel at product tank not for component tanks. If you look at into the Blend Composition window (Optimize Blend Dialog Box) and verify information in COMP column, for HEEL the tank corre... |
Problem Statement: What are the different methods to assess Aspen DMCplus model curves? | Solution: The Aspen DMCplus model tool provides multiple methods to judge whether the response curves are representative or not.
1. Comparison between actual and predicted value in the Aspen DMCplus model
If the actual and predicted curves almost overlap each other (some error is expected in real world), this means the... |
Problem Statement: Worksheet cell is not updated with calculated value from an Activated Process model even though the variable value in ASW organizer has been updated. | Solution: In addition to using the Protect Access box in ASW to implement access restrictions (KB 130253), users can also use the Microsoft Excel’s built in Worksheet Protection to limit access to cells or range of cells in the workbook.
However when cells in the workbook that need updating from ASW have the Microsoft ... |
Problem Statement: How do I restart the What-If Simulation processes when showing BUSY: Simulation task is running? | Solution: The following procedure is for a “clean restart” of the Watch (IP.21) processes related to What-If Simulation.
- Go to InfoPlus.21 Manager, Actions menu, Utilities, Show Active tab, Task Name: TSK_IQ1. This shows what is the Current Record being processed, usually the one that is in an improper state.
I... |
Problem Statement: How to turn on debug logging for Adaptive Modeling? | Solution: If the Adaptive Modeling calculations are not working properly, the debug feature can be turned ON to help troubleshooting the problems.
To turn on debug, Open InfoPlus.21 Manager and locate the three adaptive tasks TSK_ADAP, TSK_ADM1, and TSK_ADM2 in the live task list and STOP them.
Locate each of the abo... |
Problem Statement: How to change units for a variable in Aspen Simulation Workbook (ASW)? | Solution: You can change the units in ASW in two ways.
1. Using the Organizer you can select the desired variable for the concerned variable.
2. In Excel, you need to select the variable-right click- Simulation Workbook Tables- Change Units
Keywords: ASW, Simulation Workbook Tables,Convert Units
References: Non... |
Problem Statement: Handling large APC Builder Project files can be a challenge because it takes long to transfer large files. This solution describes how to handle large project files in APC Builder? | Solution: See attached document with suggestions on how to compress the file size of large APC Builder Project files. We provide a case study where we compress a project file using Windows 7z.
Keywords: Data Compress
Winzip
APC Builder Project
References: None |
Problem Statement: Why should Gel Effect be accounted for in polymerization kinetics? | Solution: In general, Gel effect takes place due to either rapid polymerization or lack of solvent in the reactor. Gel effect phenomena should be accounted for avoiding following adverse effects:
1. Termination reactions become diffusion limited
2. Uncontrolled polymerization rate and polymer molecular weight increase ... |
Problem Statement: I have exported a model from Aspen Custom Modeler (ACM) to Aspen Plus. The output stream properties from my ACM exported block in Aspen Plus give incorrect conditions. | Solution: Most likely, the cause of the problem is due to the fact that the enthalpy of the output port has not been calculated correctly in the model developed by the user.
One quick work around is to select in the Block Options, Stream Flash the appropriate flash type e.g. "Temperature & pressure" if your ACM model... |
Problem Statement: Is it possible to switch to the traditional method of using data slices during model identification in Aspen APC Builder? | Solution: The manner in which APC Builder handles data slices during model identification (ID) is slightly different from the traditional approach used in DMCplus Model. In the traditional approach, an user could add all bad slices onto a single CV and when this CV was included in any case, the model ID would apply the... |
Problem Statement: How to incorporate Gel effect parameters in reactions kinetics? | Solution: The following steps need to be taken to incorporate Gel effects in polymer reaction kinetics
1. Enable the “Include gel effect” from Navigation Panel > Reaction > Gel Effect
2. Select the appropriate correlation. Currently there are two (reserved as 1 and 2) built-in gel effect correlations available in Aspen... |
Problem Statement: Why am I unable to see the mass & mole flow in the stream results with respect to component groupings when I specified component groupings by using SUM-MLFL & SUM-MSFL property sets? | Solution: In Aspen Plus, you can get the sum of molar & mass flows for the specific components by defining SUM-MLFL(Sum of mole flow for specified components) & SUM-MSFL(Sum of mass flow for specified components) property sets. If you have large number of component lists and you are interested in specific components su... |
Problem Statement: What are the different Reaction ID types & Where it will be used? | Solution: Use the Reactions forms to specify stoichiometry and rate parameters for rate-controlled and non electrolyte equilibrium reactions.
Location: Data Browser/Reactions/Reactions/Select "New" then select "Type"
Other reaction types, EMULSION, FREE-RAD, IONIC, SEGMENT-BAS, STEP-GROWTH and ZIEGLER-NAT use in Aspe... |
Problem Statement: The explanation of the feed conventions in Radfrac NQ Curves for the additional feeds are unclear to me. Can you explain those in details? | Solution: The example attached can be used to verify the results explained below.
The original column has S=100 stages. The primary feed stream (BASE) is on stage B=70 while the other feed stream (FEED2) is at stage F=65. The following shows how the location for stream FEED2 is calculated for each convention for the ca... |
Problem Statement: Aspen Plus or Aspen HYSYS may crash when trying to add PSV blocks in the Safety environment. This can occur on a computer running Windows 7 with a 32-bit CPU. This was happening for any simulation file. | Solution: The problem was resolved by enabling the access to large memory range.
To enable large memory space (3 GB memory):
1. Open a command window with administration privileges:
2. Type the command:
bcdedit /set IncreaseUserVa 3072
3. Reboot the computer
Keywords: PSV, crash, safety, memory exception
... |
Problem Statement: When making a new Custom Stream Result, how can it be made available for all blocks and streams? | Solution: By default, when a new Custom Stream Result is made, it is only made available locally (i.e. the block or stream where it was created).
The locations were a Custom Stream Result is made available can be changed by right-clicking on the sheet tab and selecting Change Type. From there, the radial buttons contro... |
Problem Statement: Why does a mixture of propanol and ethanol show an azeotrope at high pressures (greater than 5 bars) when using NRTL property method? | Solution: The binary parameters for the mixture ethanol-propanol are regressed for low temperatures and pressures, as shown in the images below,
If we use this parameters then we will find an azeotrope at high pressures as shown in the image below,
in this case you should use the binary parameters from the NIST data... |
Problem Statement: How can I hide or remove the Economic, Energy, and EDR Exchanger Feasibility Activation Dashboard in Aspen Plus? | Solution: In order to hide the Activation Dashboard the user should follow these steps:
1. In any Aspen Plus file go to File | Options
2. Select the Advanced section and activate the Disable activation dashboard checkbox
3. Click on OK to apply and save the changes
Keywords: Activation Dashboard, hide, remove, ec... |
Problem Statement: On which platforms can I run aspenONE Engineering? | Solution: Please refer to the following table of platform compatibility for aspenONE Engineering:
Area
Platform
V2006.5
V7.0
V7.1
V7.2
V7.3
V8.0
V8.4
V8.6
V8.8
Released
Jan-2008
Sep-2008
Jul-2009
Jul-2010
May-2011
Dec-2012
Nov-2013
May-2014
May-2015
Client OS
Windows 2000
Yes
No
No
No
No
No
No
No
No
Windows XP
Yes
... |
Problem Statement: What roughness K is being used in HeatX in detailed mode? | Solution: For calculation in detailed, if roughness is not defined, it uses the default value of 4.572e-5 meter.
Note that "Detailed" mode is only available for existing simulations in V8.8 and higher.
Keywords: roughness, detailed, heatx
References: : CQ00702238 |
Problem Statement: Is it possible to delete points in a plot? | Solution: It is possible to remove points from a plot after the plot has been created.
To delete selected data points from a plot:
1. Display the plot.
2. Hold down the left mouse button and drag the cursor to form a rectangular outline around the data points that you want to delete.
3. Click the right mous... |
Problem Statement: How to add and customize a new view to stream results (custom)? | Solution: 1. First click on the Streams (Custom) from the results summary as shown in the figure below.
2. Right click on the default tab and select Add New as shown below:
3. Provide an Input Name to the new view and customize it according to your requirement using the wizard.
Keywords: stream results, custom st... |
Problem Statement: When entering large numbers into an IP_AnalogDef record, because it uses a 32-bit real value it may truncate the number stored. Is there an easy way to store large numbers in a standard analog record in Aspen InfoPlus.21? | Solution: With IP.21 V8.8 a new definition record has been added. This is called IP_AnalogDblDef and is based on the standard IP_AnalogDef record but uses double precision real values for fields such as IP_INPUT_VALUE and IP_VALUE. This saves you having to create a custom record to increase the precision for real fie... |
Problem Statement: I tried to update the old database create by V7.1 or earlier, but encounter the error message "database write error;please check the version of the interface database." | Solution: This solution describes the following procedure for updating old databases (V7.1 or earlier):
1. Copy Interface.mdb from "ProgramData\AspenTech\Aspen Utilities Planner V8.4\Template Databases" folder to the folder containing the database files (this is "ProgramData\AspenTech\Aspen Utilities Planner V8.4\Ex... |
Problem Statement: How is pressure drop for a reducer calculated in Aspen HYSYS? | Solution: The pressure drop for a reducer is calculated by the formula:
DP = [K + 1] * [rho(out) * v(out)^2 / 2] - [rho(in) * v(in)^2 / 2]
DP = static pressure loss
rho = fluid density
v = fluid velocity
K = reducer K factor
The reducer K factor is a function of angle; for swages less than 45 degrees, this factor is go... |
Problem Statement: How can we display a summary of input and results for all blocks in the flowsheet? | Solution: The V8.8 release includes a new report feature available under the Report menu, which displays a summary of input and results for all blocks in the flowsheet. By default HTML report is displayed.
But you can configure it to also show a Microsoft Excel report(Report ->Setting)
Keywords: Report
References: No... |
Problem Statement: When the 'Simple Resistance Equation' sizing method is selected in a valve, why is the flow rate calculated by Aspen HYSYS not equal to the value using the sizing equation as shown in the Sizing page? | Solution: The solution of the 'Simple Resistance Equation' can encounter numerical difficulties for flow rates that are close to zero. To enable robust simulation in such conditions, Aspen HYSYS slightly modifies this equation for dynamic simulations. The modification involves introducing a new parameter (alpha) in the... |
Problem Statement: When clicking on the “Apply Changes” button after modifying a value of, let's say for example, the “Value” column of [Data Management] - [Demand Data] - [Demand], the message “Save the changes as Permanent Overrides” appears:
This solution explains what will happen if you choose Yes and what will hap... | Solution: If [YES] is selected, the changes will be saved and also the override is saved on the [Data Management] - [Data Overrides] screen.
If [NO] is selected, the changes will be saved but the override is not saved on the [Data Management] - [Data Overrides] screen.
Keywords: Overrides
Apply
References: None |
Problem Statement: How do I install Aspen Engineering Products on a client machine without the Aspen Properties Enterprise Database (APED) while connecting to a remote APED Server? | Solution: Many customer environments do not allow installing any databases on a local user machine. These customers will maintain a central SQL Server hosting all the databases.
To host a Aspen Properties database on a SQL Server, please follow KB Solution: 145154
Configure the client machine to disable local APED a... |
Problem Statement: How to migrate Aspen Properties Enterprise Database (APED) from SQLLocalDB to Central SQL Server. | Solution: aspenONE V8.8 Engineering products will use Aspen Properties Enterprise Database (APED) which can be hosted on SQLLocalDB or SQL Server Express on local machine or on Central SQL Server Database. If customer has initially hosted the database on SQLLocalDB and wants to migrate to Central SQL Server Database th... |
Problem Statement: TABLE DPO_SOLUTION_COLUMNS does not generate all the fields.
When you open the Results.mdb file, there are lots of missing columns on DPO_SOLUTION_COLUMNS. | Solution: Open the model on PSC, [Program Options] > [General] Tab and check "Use breakout columns in solution output tables" option and run the model again. The newly created Results.mdb has the DPO_SOLUTION_COLUMNS table which has all columns.
KeyWords
DPO_SOLUTION_COLUMNS
Results.mdb
Keywords: None
References: None |
Problem Statement: Is it possible to run two Excel files with linked Aspen Properties simulations at the same time? | Solution: You should only work with one Aspen Properties property package at once. If you double click on the 2nd file, you will get the error "You already have an Aspen Properties package open in the existing workbook. If you want to work with another property package, close the existing workbook first."
However, it i... |
Problem Statement: This article describes how to model situation when our costs per transported unit decrease with increasing transported amount according to undermentioned cost matrix: | Solution: Building a model:
Let’s assume we have NODES:
MATERIALS:
DEMAND:
SUPPLY:
To describe different cost levels in table TRANSPORT we need to create dummy Modes
and assign Capacities which will trigger usage of next dummy Modes (cost level):
Once we use Capacity we need to define it in table CapTRANSPORT:
Th... |
Problem Statement: What standard reports are available in Aspen Fleet Optimizer? | Solution: What standard reports are available in Aspen Fleet Optimizer?
Cancelled Orders Report
The Cancelled Orders report prints all shipments that were deleted and not put in the Delivered Shipments Log for customers who are in the process of an RVP\OXY conversion. This report can be sorted by Terminal and Zone.
C... |
Problem Statement: I have Aspen Capital Cost Estimator (ACCE) V8.7.1 installed in my computer and I would like to install ACCE V8.8. Can I have both versions both ACCE V8.7.1 and ACCE V8.8 installed on my computer? | Solution: Versions 8.7.1 and 8.8 cannot coexist in the same computer; the versions that can coexist are either V8.6 and V8.7.1 or V8.6 and V8.8.
Keywords: coexistence, compatibility
References: None |
Problem Statement: What is the Cost Basis for aspenONE V8.8? | Solution: Cost Basis for V8.8 is the first quarter of 2014 (V8.8). The Indices being used can be seen in the table below:
Cost Basis: First Quarter 2014
Material
Construction
Engineering
Construction Mgmt.
USA
2250
2090
1500
1810
UK
3220
5190
5330
5070
EU
2360
1940
1950
1810
JAPAN
1790
1380
2150
2010
ME
2310
2540
16... |
Problem Statement: I upgraded to V8.7.1/V8.8 and no, whenever I run the interactive reports, I get prompted with errors that make it impossible to launch the reports.
"Aspen Icarus Reporter - Check DSN Error 429: ActiveX Component can't create object"
Â
or
"Aspen Icarus Reporter - Database Connection Error 3706: Provi... | Solution: This is common if you previously had V8.4/V8.6 and could happen for the following reasons:
1. You do not have Microsoft Access installed in the machine. For the interactive reports to run properly, you must have Access installed. This was not a requirement previously for older versions, but for the newer ... |
Problem Statement: Some customers decide to install both Online server and Web server components in the same host machine. In certain rare cases, it happens that the Web Server component cannot see the Online server component.
Symptoms
The APC Web Interface shows a yellow circle for all data hosts, even when they are... | Solution: 1. Go to Start > Control Panel > Administrative tools > Local Security Policy.
2. Under the "Local Policies" heading, select "Security Options" and look for the entry, "System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing."
3. Disable the FIPS compliance Local Security Polic... |
Problem Statement: When configuring the Security and Access Permissions for a DMCplus controller a particular user can be configured to be able to access and/or edit the DMCplus parameters of a specific type. These type setting for the parameters are pre-defined in the software. This article discusses the procedure to ... | Solution: All DMCplus parameters are assigned a specific entry type they belong to. Based on this setting, a particular DMCplus parameter can be made accessible to a specific group of users. The different entry types that the parameters are classified into include- Standard\Admin Entries, Operator Entries, Engineer Ent... |
Problem Statement: Login password for Administrator accounts are usually changed frequently by users for security purposes. Typically this situation would arise due to network policies for customer. If one such administrator account is used to start all AspenTech related services on PCWS, it requires the user to update... | Solution: Users have the option to use a Network Service account to run AspenTech related services, instead of using an Administrator login. A Network Service account does not require a password and has the same privileges as the local Administrator account.
Keywords: Network Service
Administrator
References: None |
Problem Statement: In certain installations, the Production Control Web Page (PCWS) call ups are slow and take more than 15 seconds to display all the registered controllers. | Solution: Long PCWS call-up time typically occurs when certain settings are not properly configured on the Web Server. It is possible that the machines might be configured to use both local groups and domain groups in their Local Security database. The enumeration of these user groups can cause slow initial logon times... |
Problem Statement: Svchost.exe consuming large amount of memory on the Web server. | Solution: The problem is caused due to a bug in Microsoft Windows 2008 R2 when running IE10 or IE11 and not related to Aspen APC suite of products. The fix for the problem being either downgrade to IE9 or apply Microsoft updates/hotfixes (KB2847346 and KB2889748) to resolve the problem. However, some users have complai... |
Problem Statement: The size of model folder is increasing even after ?Cleanup Model?.
Can I reduce the size of model folder? | Solution: The cause of the problem is typically the size of Results.mdb file. It is the default output database file that stores all results from the PIMS runs. The size of Results.mdb increases a lot after large number of case runs.
There are settings in Aspen PIMS to help manage the size of the Results.mdb file.
1... |
Problem Statement: As customers upgrade to newer versions of PIMS, they are noticing that the sign convention for the reporting of Pi values has changed. It appears that this is an issue on which the PIMS User community cannot find consensus. About half of the users we hear from like the old convention and half like th... | Solution: As of PIMS 2004.1_073 (PIMS 16.18) a new toggle has been added. This toggle allows the user to reverse the sign convention for the reporting of Pi values. This new toggle is called SIGNREV and can be activated on the MODEL SETTINGS | REPORTING | MISCELLANEOUS tab in the latest versions of PIMS. If the margina... |
Problem Statement: How to use Table CASE to modify Model Settings? | Solution: Use Model Settings to maintain settings that pertain to the execution of a specific model. Model settings control the way PIMS looks and feels and control the actions of the chosen optimizer.
The model options that are available vary depending on your whether you are using DR (Distributive Recursion) or XNLP ... |
Problem Statement: M/XPIMS permits a maximum of 100 local models to be assembled in a global model.
What is the list with the 100 valid characters for MODEL names in Table MODELS or DEPOTS in Table DEPOT? | Solution: Here is a list of 119 allowed characters to name models. This list can actually be expanded by the use of special characters of different alphabets if the number of DEPOTS plus MODELS is higher than 119, as the characters used for the DEPOTS must be different than the characters used for the MODELS.
! # $ %... |
Problem Statement: Install IP.21 V8.7 on windows server 2008/2012 R2 Korean version system, IIS will be corrupted after the installation. | Solution: Root cause: there are some messy codes in C:\Windows\System32\inetsrv\config\applicationHost.config file.
You can copy the correct one from Windows server English version. The messy codes is in 171th lines, please refer to the following picture.
Keywords: Korean version
IIS corrupted
Installation
References: ... |
Problem Statement: What type of events are logged in AspenWatch Event Log for DMCplus legacy controllers and for APC Builder controllers? | Solution: The Aspen Watch | Event Log would only historize certain messages for DMCplus controllers instead of all messages. This is because Aspen Watch uses Cimio to collect the data from the DMCplus Context and can read messages associated with a change in a particular parameter in the controller (like limits, tuning... |
Problem Statement: Microsoft EMET (Enhanced Mitigation Experience Toolkit) software can cause Run-time error '429' when launching Aspen Watch Maker. This software is distributed starting Windows Server 2012 R2. | Solution: The following tip is provided in case the Aspen Watch server runs into this problem when launching Aspen Watch Maker AND Microsoft EMET software is present in the system, and is preventing to open Aspen Watch Maker.
· Log on to the Aspen Watch server
· Open a CMD window (run as Administrator) ... |
Problem Statement: When invoking any Custom Report from the PCWS, the following message is received:
Error in generating report "<report name>", section "<section name>"
[AspenTech][SQLPlus] Failed to connect to server
[Microsoft][ODBC Driver Manager] The driver doesn't support the version of ODBC behavior that the app... | Solution: This issue is typically caused if the SQLplus ODBC component has not been configured on the Web server. This communication is used by the Web server to communicate with the Aspen Watch server for all SQL related reports.
Open ODBC Data Sources (32-bit) (odbc32ad.exe located in SysWOW64 folder) and add the S... |
Problem Statement: How can I ramp the output of a PIDincr controller? | Solution: The PIDincr controller implements the velocity-based formulation of the PID control algorithm. This implies the setpoint and the output variables, SP and OPman respectively, are "state" variables. A state variable is a variable which the model uses the time derivative. It is not possible to ramp state variabl... |
Problem Statement: How do I configure an Aspen Watch Report with Subcontroller information? | Solution: Please use the following procedure as a general guideline:
1. Build Custom Calculation to be included in the report: In Watch Maker, navigate to Tools (menu) | Custom Calculations and select the Controller (that has Subcontrollers) from the Application drop down, the Scope as General and click the New but... |
Problem Statement: Upgrading AspenWatch IP.21 database may result in the creation time of the AWEvents record to be reset to the time of the upgrade. If that happens, IP.21 cannot fetch historical data past the upgrade time even though older data existed in the repository. | Solution: To find out the creation time of the AWEvents record, open Aspen SQPLus application on the Aspen Watch Server and issue the following query:
WRITE XOLDESTOK('AWEvents 1 AW_H_TIME_1');
If the result is newer than what TSK_EVTH repository indicates, then InfoPlus.21 (IP.21) can not go back past the creation dat... |
Problem Statement: What is the major cause of thermal convergence error and how to resolve it? | Solution: Often, thermal convergence issues arise due to “Constant Duty” heat input option. With Constant option, heat transfer between process fluid and heating/cooling medium is not controlled by temperature difference. During dynamic run, vessel (Flash tank, reactor etc.) may experience dry condition due to reduced ... |
Problem Statement: What are the default performance & efficiency curves for pumps in Aspen Plus if user does not enter any performance data? | Solution: If user did not enter performance and efficiency curves in Aspen Plus, the user will get the below message when exporting the simulation to Aspen Plus Dynamics.
In this case, what are the “standard� pump performance curves used by default?
Go to Online Help in the Aspen Plus Dynamics in V8.8.
1. Go to the... |
Problem Statement: Why is a gas stream was not included in a Group total in the Full | Solution: report?
Solution
The stream in question might be included in Table UNITS. Table UNITS is used to specify a unit of measure for a stream that is different than the default. If a particular stream has different units of measure than the other members of the group, PIMS will not sum this stream with the liquid... |
Problem Statement: Is it possible to see a record of past Aspen PIMS runs, especially objective function values? I have cleaned up my model and have lost the reports and other solution files. | Solution: PIMS maintains a database with the run history of your model. This is an MS Access file with a name like PMLOG11.mdb and is kept in the parent folder of your model. The PIMS Log file requires MS Access to be installed on your machine.
You can access the PIMS Log database from the PIMS menu system: File | Vi... |
Problem Statement: Gaseous streams were previously modeled in the same way as liquid streams; for volume - weight conversions, the SPG used was relative to water. This necessitated the use of artificial volume measures for gases (e.g. "fuel oil equivalent barrels") or very small SPG values for gases. | Solution: A new table, GASES, is available under the Miscellaneous branch of the PIMS model tree.
Table GASES is used to indicate which materials in the model are gases. PIMS treats the SPG for these streams as their density relative to air and not water so that their values are of reasonable size. During reporting tim... |
Problem Statement: In Table PINV in multiperiod Aspen PIMS models, there are two mutually exclusive inventory penalties sets:
1) OCOST, CPRICE
2) AOCOST, ACPRICE
In both cases, also HCOST and PCOST are used.
The first set of penalties (OCOST, CPRICE) is described in solutions 113149 and 103932. This solution describe... | Solution: Description of AOCOST and ACPRICE
AOCOST stands for Actual Opening Cost and ACPRICE stands for Actual Closing Price. AOCOST will be used as the cost of "purchasing" the opening inventory of the first period and ACPRICE as the price of "selling" the closing inventory of the last period.
In the Objective Func... |
Problem Statement: A PIMS user asked if it were possible to report whole crude properties in the | Solution: xxx.xls report.
Solution
The Summary Solution Report is not easily configurable by the user. The categories of solution information in this report are limited to purchases, sales, capacity utilization, and process limits. So, the trick is to alter the model so that the additional data fit into one of these ... |
Problem Statement: How can we force our Aspen PIMS model to recurse a property for a specification blend? | Solution: By default, Aspen PIMS does not recurse properties for specification blends. In most ciccumstances, it is sufficient for Aspen PIMS to place constraints, to enforce blend specifications, on the properties of the finished blend. Explicit recursion of those properties would create unnecessary structure in the m... |
Problem Statement: What is the possible reason for error message “IterationLog.lst was not found”? | Solution: Users may face the error message “IterationLog.lst was not found” when they run a fresh model the first time. The possible reason for this error message may be related with the matrix and output setting in the execution dialog. In the execution dialog box, if users select “Generate Matrix” and “Open Report Wi... |
Problem Statement: How does Aspen PIMS choose whether to use either a blend property or a blend index spec? And how does Aspen PIMS report them in solution files? | Solution: Aspen PIMS calculates blend properties based on what the user defines in BLNSPEC. Take RVP and RVI as example. If a user defines a spec for the property index, such as XRVI (MAX RVP index spec), then Aspen PIMS will obey the property index limit, and report both RVI and RVP, where RVP is calculated from blend... |
Problem Statement: What is the easiest way to convert from an Aspen HYSYS databank to Aspen Properties? | Solution: In V8.0 and above, you cannot convert an Aspen HYSYS databank to Aspen Properties directly. The workaround is to copy the component list and select Aspen properties when windows pop up as below screenshot.
Â
After adding the component list, Aspen Properties fluid package needs to be added with the proper... |
Problem Statement: How does Aspen HYSYS convert a dimensional curve to a Quasi-Dimensionless curve? | Solution: These are the calculations Aspen HYSYS follows in order to convert the information from a dimensional curve to a quasi-dimensionless curve:
1. Converted Mass Flow:
Where:
FQD is the converted quasi-dimensionless Mass Flow.
FD is the actual mass flow.
Tin is the inlet stream’s temperature
Pin is the inlet ... |
Problem Statement: Why is the Tray Sizing Utility predicting a diameter of less than 1ft when in rating mode? | Solution: Even though you are doing a rating calculation, HYSYS does a preliminary design calculation based on the liquid and vapor flowrates and fluid properties to determine some initial parameters that are then used to calculate the parameters when a full rating calculation is done.
For example, the downcomer area i... |
Problem Statement: Why I'm not able to see the Rate-Based Distillation Column unit operation in HYSYS? | Solution: This unit operation was removed after HYSYS 8.3. User can continue working with this unit operation directly from Aspen Plus or use Rate-Based Distillation through HYSYS regular column (go to Colum Editor view> Parameters tab> Acid Gas). This option is only available when you are using Acid Gas Property Packa... |
Problem Statement: How do I install Microsoft Visual C++ 2010 runtime? | Solution: In this knowledge base article we will be looking at how we can install Microsoft Visual C++ 2010 runtime.
Step 1: Download both files for 64bit OS (vcredist_x64.exe and vcredist_x86.exe) Only vcredist_x86.exe is required for 32bit OS. Files are attached in this knowledge base article.
Step 2: Right click on ... |
Problem Statement: How can I block the SLM Configuration Wizard from launching on a non admin user machine? | Solution: The System Administrator would like to restrict users from making changes to the SLM Configuration Wizard. This can be done by modifying the Windows Registry on the user's machine.
To block changes to the SLM Configuration Wizard, please follow the below steps.
1. Open the Windows Registry and navigate ... |
Problem Statement: Unable to launch Aspen Process Manual on a machine with aspenONE Web Interface installed | Solution: Aspen Process Manual and aspenONE Web Interface uses the same Internet Information Services (IIS) port 80, which creates a conflict with Process Manual and that leads to HTTP Error 404.0 – Not Found error.
Alternate Solution:
- Users who need Process Manuals Articles can use aspenONE Exchange as a rep... |
Problem Statement: Trying to run standard trends on Process Browser gives "Invalid Server" message and no trends are displayed. This happens when the IP.21 Process Browser server is running on Windows 2012 Server. | Solution: In order for Process Browser trend controls to work, Remote Data Services (RDS) must be functional. If this is not the case, you get "Invalid Server" errors in the value field. Microsoft have done away with Remote Data Service server components from the operating system after Windows 7, so it is not present... |
Problem Statement: When opening a project received from colleague, the following error message is encountered. | Solution: The error is due to the colordef.dat file is missing from the project. To resolve this issue,
1. Browse to C:\Program Files\AspenTech\Web21GraphicStudio\etc or C:\Program Files (x86)\AspenTech\Web21GraphicStudio\etc folder.
2. Copy the default colordef.dat from the folder to the project folder.
Keywor... |
Problem Statement: What are the 2 phase relief valve sizing methods available in HYSYS when compared to Aspen FLARENET? | Solution: HYSYS uses only a basic relief valve sizing method that uses the simple all-vapor or all-liquid equations similar to API 520 1977 method. Two-phase systems are modeled simply as a the sum of the vapor and liquid contributions. Refer to solution 116775 for more information for methods used for relief valve siz... |
Problem Statement: I have selected as property package NRTL from HYSYS and NRTL from Aspen Properties to compare results; however I notice that the results are not the same, although both of them use NRTL and both have the same component’s composition and conditions. Why is that? | Solution: NRTL has an equation that is used to calculate the VLE and LLE. Aspen Properties’ NRTL (And NRTL-RK, NRTL-2, NRTL-HOC, NRTL-NTH) uses the following equation:
Where:
Also aij, bij, eij, and fij are unsymmetrical. That is, aij may not be equal to aji, etc.
Aspen HYSYS’ NRTL uses the following equation:
As you c... |
Problem Statement: Line Sizing calculations in the Safety Analysis Environment: Assumptions, limitations, and known issues | Solution: The attached document describes the line sizing calculations as they are currently implemented in the Safety Analysis Environment.
This is important to note that calculations are not as detail as in Aspen Flare System Analyzer. If you are interested in performing a more rigorous calculation user may use Aspen... |
Problem Statement: Why is Tray Sizing oversizing a stage where there is a feed stream leading to it? | Solution: Tray Sizing may oversize trays where there is a feed stream because the vapour portion of the feed may get included in the vapour flow to the tray. This will cause the vapour flow rate to and from the tray to be exaggerated, thus leading to an oversized tray.
The following steps can be taken to exclude the ... |
Problem Statement: In some cases, there is big difference in calculation results between Oil Manager and Assay Manager, TBP temperature in Assay manager is much lower than the calculation results in Oil Manager. | Solution: There is difference between Oil manager and Assay manager for the method which convert from D1160 to TBP. Oil Manager provides the option for Vacuum and Atmospheric conditions, while Assay Manager only can do Atmospheric, in some cases, the data entered into Oil manager is Vacuum. So there will be calculation... |
Problem Statement: The expected equilibrium curves with Glycol package (which uses TST EOS) when compared with TST thermodynamic package are not similar. Why the difference? | Solution: The Glycol package is based on the same basic EOS as the TST package, however it uses a different, more advanced mixing rules which are better suited for very non-ideal systems such as TEG, water and methanol, etc. Therefore, we do not expect Glycol to give the same (or similar results) as TST for this system... |
Problem Statement: Can an imported variable be copied (exported) from one spreadsheet to another spreadsheet? | Solution: Yes, you can copy from the imported variable from one spreadsheet to another spreadsheet by using the Send to option as shown below.
This copied imported variable will be now linked to the spreadsheet it was sent and not to the stream/object variable in the flowsheet.
You either copy this imported value to a ... |
Problem Statement: How to find the maximum concentration of a component in my simulation? | Solution: You can use the colour scheme for the streams in your simulation in order to find which one has the maximum concentration of an specific component.
In the Flowsheet/Modify tab located in the Ribbon click on the Editor button.
In the Conditional Formatting window, go to the Scheme Name and select the “Add New... |
Problem Statement: How to simulate a column where on a particular stage, the liquid leaving the stage is cooled (external to the column, i.e. the liquid flow path is not via the downcomer) before re-entering the column on the stage below?
A sketch of this system is shown below: | Solution: This column configuration is not typical and as such, there is no pre-made template for this. However, this can be simulated by customising an existing column template (available from the model palette) or creating a new column template. A flowsheet picture (from within the column sublfowsheet view) is shown ... |
Problem Statement: What is the definition of average velocity in the PSV line sizing tab for inlet and outlet lines and how is it calculated? | Solution: The average velocity on the PSV line sizing tab is the volumetric flow rate divided by the cross sectional area.
For the vapor case, the average velocity is based on the rated flow, the cross-sectional area of the line, and an average of the exit density and the density at the total back pressure. Note that... |
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