question stringlengths 19 6.88k | answer stringlengths 38 33.3k |
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Problem Statement: : | Solution: Lead Alkyl Susceptibility Relationships
Lead susceptibility graph paper has been used for many years to estimate octane number at any lead level when octane numbers at two lead levels are known. Using these charts, a straight line drawn through two points approximates the entire octane number versus lead conc... |
Problem Statement: How to print Aspen PIMS documentation and help? | Solution: The electronic copy of the System
Keywords: None
References: Manual (also called user guide or user manual) is no longer delivered with Aspen PIMS installation as the same information is now in the Help file. If you need paper copy of the document or any help topic, print from the online Help.
To print the He... |
Problem Statement: SLM is the new licensing system that is being used for all Aspentech products as of the aspenONE release. The aspenONE release contains version 2004 of the PIMS Family products. Before aspenONE is shipped, clients must specify how they would like the licensing for the products set up. There are sever... | Solution: There are several options for licensing configuration with SLM and the aspenONE release of the PIMS Family products. You must choose how you would like your products licensed before our Order Administration group can process your upgrade request. Below is a summary of the options and how to properly request t... |
Problem Statement: Sometimes PIMS seems to take a very long time to read my input tables. This is especially noticable when it involves the CASE table, since it delays the display of the Run Execution Dialog Box. What can I do to speed this up? | Solution: If your input tables are in Excel 95 format (or a combined format that includes Excel 95), then PIMS can read them much faster. This is because PIMS can read this format directly without accessing Excel itself. However due to changes in Excel, PIMS must access Excel and use it to read input tables that are of... |
Problem Statement: The model is set-up to sell a stream on a volume basis in a weight based model. When the model is run, it generates an optimizer error of the type shown below. What can cause this?
XPRESS Optimizer
? 98 Error: At line
729
no match for row VBALUR2
CPLEX Optimizer
CPLEX Error 1448: Line 729: 'VBA... | Solution: A possible cause of this problem is that the model has several ALTTAGS tiers and at least one of them has not been flagged as VOL in table sell. Putting a "1" under VOL for the offending stream will solve the problem.
KeyWords:
alttags
Keywords: None
References: None |
Problem Statement: When running PIMS using the XPRESS optimizer, you sometimes see the message "unable to remove shift infeasibilities" in the iteration log. | Solution: When solving numerically difficult problems, the optimizer may temporarily shift variable bounds by small amounts. The warning message "unable to remove shift infeasibilities" arises when the optimizer is unable to restore the original bound.
Getting this message indicates that the model is over constrained a... |
Problem Statement: The modeling of a contaminant removal process such as a hydrodesulfurization unit can be as simple or as complex as the modeler feels necessary. Through the use of various options within the PIMS system, the modeler can structure the contaminant removal in several ways. The modeling of the severity o... | Solution: Please see the attached document.
Keywords:
References: None |
Problem Statement: When do I need a new license file for products in the PIMS Family (PIMS, ORION, DPO, MBO, and Report Writer)? | Solution: The need for a new license file occurs anytime the internal version number of the product changes. Recently this has occurred per the chart below:
aspenONE 2004 - all products switched to SLM licensing system and required new license files
aspenONE 2004.1 - all PIMS Family products changed their internal ... |
Problem Statement: ?o?????U???I???U?????I?u?????h?E`??e?e?????E?X?g?S?[?????C?I?????E???f???>??? | Solution: ?Y?t?I???f???I???I?a`e?I?a??? ?e?B?@???I???f?????I?X?g?S?[?? zzz ?I???U SCD1 ?U???I ?u?????h?>?iZZZ?E?a?s?-?BZe?????E???E?a?????e?B
1) ?e?[?u?? ASSAYS?E?X?g?S?[??zzz???Y?e???e. ???I?a???I100% ?P???V???????????A???e. ?
2) ESTzzz ?s??Table CRDDSTL ?E?e?`?????I?X?g?S?[?????K???Ecrude unit?????????e?e?????E??... |
Problem Statement: Is it possible to put an additive into a preblend? In other words, is it possible to put an additive into a specification blend that is a component to another specification blend? | Solution: You can put an additive into a preblend but its effect on the blend quality cannot be carried forward into another destination.
Suppose that your model has a preblend, called PRE, that feeds a finished blend, called FIN. PRE receives an additive. The reason for this limitation is related to the recursion stru... |
Problem Statement: PIMS can and will overwrite non-placeholder coefficients if they are in "update" positions.
An update position is a place where PIMS expects to update the coefficient with the current value of a property, regardless of the value of the coefficient. In general, this involves an intersection of a row t... | Solution: In the attached model, there are two submodels that demonstrate how PIMS can overwrite non-999 coefficients.
Submodel SCFP represents a feed pool for the cat cracking unit, SCCU. It is a normal pool structure with a couple of additions. Row GSULCFP is an attempt to constrain the weight % sulfur of the cat fee... |
Problem Statement: Caution: PIMS will give an error if all crudes allocated to a logical crude unit are disabled | Solution: Crudes can be removed from a PIMS model using the DISABLE column in Table BUY. Caution should be exercised in using this feature, however, because if all crudes allocated to a logical crude unit are disabled, then PIMS will generate an error message.
Crudes are allocated to a logical crude unit using Table CR... |
Problem Statement: Of the problems experienced by the users of PIMS models, the most vexing usually fall into one of these categories:
Infeasible solutions
Materials out of balance
Failure to converge
Locally optimal solutions
This solution outlines how to address these categories of problems. | Solution: Please see the attached Adobe Reader (.pdf) document. It is based on a Powerpoint presentation that was first presented at the 2005 PIMS User Conference.
Materials out of balance are also covered in Solution 115634, "Diagnosing Materials Out of Balance."
KeyWords
infeasible
infeasibility
balance
imbalance
co... |
Problem Statement: A capacity, purchase, sale, transfer, etc. needs to be turned off during a particular run. What is the best way to do this within PIMS? | Solution: Many times it is necessary to model a plant with particular purchases, sales, capacities, etc. turned off. There are multiple ways to do this and several options are discussed below.
MATERIAL STREAM: To disable a material stream and eliminate it from all parts of a model, use Table DISABLE. This will eliminat... |
Problem Statement: You have received your license file, but would like it configured differently. For example, you received a network dongle-free license and would like a dongled network license, or you received a network dongle and would like a standalone dongle or standalone, dongle-free license. | Solution: Send an email to Help.AspenOrders@Aspentech.com. In this email include a summary of what you would like changed. Be sure to include the following data:
1) Do you want a network or standalone license?
Network licenses reside on a network license server and users connect to that server to use the license.
Sta... |
Problem Statement: : | Solution: There are times when the LP study at hand involves looking at a change in contaminant removal across a unit. Normally, the relationship between a product contaminant level and a feed contaminant level is defined in PCALC. Changing a PCALC factor is not allowed in a case stacking run. As a result, the relation... |
Problem Statement: ABML (Aspen Blend Model Library) provides a portfolio of pre-defined linear and non-linear blending prediction methods and correlations.
The ABML portfolio can be expanded by adding user defined correlations using the following ABML functions:
? GBLNVAL
? GNDXR
? GPRPCALC
? ... | Solution: In this example, we will model the property TVL (ASTMD 4814 TV/L Linear method to predict the temperature-V/L 20:1 values of Motor Gasoline (MoGas) blends) with the Property Calculation Formula facility and then access this formula through the ABML GBLNVAL function so that we can impose a blending specificati... |
Problem Statement: What causes the reported property value of a crude cut stream to not match its index value?
Please refer to below example:
I have defined RVP values for LN1 crude cut stream in T.ASSAYS:
and used Property Calculation Formula to calculate RVI:
Aspen PIMS calculated following RVP and RVI values... | Solution: The current reporting of the property value for an assay stream is calculated based on the EST rows in Table CRDDISTL and therefore will stay the same and is unlikely to be synchronized with the index value for the same stream. Other (non-crude cut) streams have relevant properties values that are back-calcul... |
Problem Statement: : | Solution: In normal PIMS shift vector structure, a deviation in the base feed quality would usually cause a change in the yield of the product. The regular structure would have a shift vector intersect the material balance row, and if any qualities of the product were involved, they would be multiplied by the yield eff... |
Problem Statement: : | Solution: There are times when the use of the Distributive Recursion technology in PIMS can be used to model extremely complicated structure. There are situations where final blend qualities are utilized in calculating another blend quality that is used in the respective blend specification. An example of this is if a ... |
Problem Statement: My model runs for many iterations without converging. It does not converge on properties, although the objective function is relatively constant from iteration to iteration. Is there a way to automatically terminate the model run? | Solution: Under Distributive Recursion, PIMS offers two different convergence modes: Converge on Property Values and Converge on Objective Function Values. In the case of the model behavior described above, it would be desirable to switch the convergence mode from property values to objective function value. PIMS does ... |
Problem Statement: In this situation a number of feeds are simultaneously processed in a unit with variable operating conditions, such as severity or reactor temperature. Yield vectors are available for each feed at each operating condition, but the non linear relationships prevent accurate modeling of the product mix ... | Solution: See the attached document.
Keywords:
References: None |
Problem Statement: Is it possible to implement period-specific submodel coefficients in a PPIMS (multi-period PIMS) model? | Solution: There are several ways to implement period-specific submodel coefficients in PPIMS.
Technique 1: Period-Specific Submodel Tables
This technique uses separate submodel tables that are specific to each period. Since rows and columns in a submodel table cannot be period-specific, one can use period-specific capa... |
Problem Statement: : | Solution: Many processes in a refinery operate in different modes. That is, a process such as a crude still may have two different modes of operation that cannot occur simultaneously. For example, a crude still may have two modes of operation and there are different capacity limitations present for each of the two mode... |
Problem Statement: PROCLIM?e?[?u???E???A?A?i?????e?e?v???Z?X?????I?T?u???f???E?????e?X?y?b?N?u?????h?I?????E?a?I???A?}?g?S?b?N?X?IZ??I?????????BSe?X?IZLIMXYZ?s?aZPRPXYZ?s??ZO?A?I?}?g?S?b?N?X?s???i?????e?U???B?A?U?eE,L,G?s???>?I??Z????\?i???U???B?U???E?A???A?Isolution 129960 ??ZQ?????A?-???????B
Su?e???IZLIMXYZ?s?aZPRPX... | Solution: ?a???I???I?'???iFREE?x?N?^?[??E-?s???E?i?????e?E?>?e?E???j???C?I?????E?K?p???e????Z|???U???B
Cat Cracker feed pool??Atmospheric Resid ?IGasoils?E`I???e?a?|?????????e???????l?|?U???B???I?a???I?U?A?Igasoils (LV1, LV2, HV1, HV2, DCG) ???e?A?I Atmospheric Resid (AR2)??? ?e?U???B
???????A?A???????????I?I?E???I?a?|... |
Problem Statement: A custmer called with an installation problem. While attempting to install PIMS, the installation procedure failed and returned the following message:
"The file ABMLdll.dll cannot be opened in write mode." | Solution: The solution was to reboot the computer. The DLL file was resident in memory and could not be overwritten during installation.
KeyWords
install
installation
failure
DLL
Keywords: None
References: None |
Problem Statement: : | Solution: It is possible to incorporate coefficients defined by the use of tables CURVE and NONLIN in distributive recursion structure (see chapter on Aniline Improver using CURVE and NONLIN above). The values from table CURVE, which are a function of some column activity in the matrix, then become "properties" which c... |
Problem Statement: : | Solution: The atmospheric residuum produced in a PIMS model has qualities that include the bulk qualities of the residua itself plus the fractional contents of the vacuum cuts. It does not contain, however, any of the qualities of those vacuum cuts. Such qualities include specific gravity, metals, etc.
In a PPIMS model... |
Problem Statement: : | Solution: There are some blending components, such as alcohol in gasoline, that have a non-linear blending quality for which there is no good index. In such cases, the user can either assume that the blending component is in the blend at a given concentration and use a constant quality, or use a PIMS recursion technolo... |
Problem Statement: How to report % desulphurisation in a hydrotreater | Solution: The required structure can be seen in submodel SKHT, which is shown below and is also available in the downloadable attachment. SKHT is described below.
Row EPRDKHT drives the activity of column HTK to be the total amount of hydrotreated product produced.
Row EDFDKHT drives column ABC to have the same activi... |
Problem Statement: : | Solution: The P-PIMS representation of a stream inventory assumes that all the production in a given period passes through the modeled tank. That means the resultant material being processed downstream of the tank has as its qualities the recursed values of the residual heel from the previous period and the current pro... |
Problem Statement: This knowledge base article describes what "NaN" in the fullsolution report means. | Solution: The "NaN" value is sometimes displayed in the fullsolution report when there is a value that is outside the allowable range for Aspen PIMS. The largest value Aspen PIMS will handle for reporting is 10^30. Such values are usually the result of a data entry error and commonly involve Table ASSAYS or PGUESS. Rev... |
Problem Statement: This solution gives an overview of how the process of optimization works in Aspen PIMS for a distributive recursion model. | Solution: The optimization process from data input to solutions output can be described as the following 3 steps:
1. User input is retrieved by Matrix Generator
Matrix Generator retrieves the data in the model input files and automatically constructs an L.P. matrix that represents the process economics, process technol... |
Problem Statement: During model execution I can see a message "Processing table PDOLD" in the status bar in the bottom left hand corner of PIMS window. I do not have this table in my model structure.
What is table PDOLD and how is it used by PIMS? | Solution: Table PDOLD is an internal copy of table PDIST that is used during matrix generation. Even if there is no table PDIST in the model, table PDOLD is created with a single row. You can briefly see the message in the status bar even with no table PDIST.
Keywords: PDOLD
References: None |
Problem Statement: : | Solution: Many times in sophisticated LP modeling there is a need to model a cross product of two qualities. Such a requirement may arise from modeling equations within the submodel structure. This example will demonstrate how to model the cross product of two qualities. The first example will be for a specification bl... |
Problem Statement: : | Solution: The formulation of gasoline determined by the U.S. Environmental Protection Agency contains limitations on the benzene content (among others) of the fuel. Refiners must be very careful to limit the production of benzene which ends up in gasoline.
Reforming traditionally served as the incremental octane source... |
Problem Statement: : | Solution: The modeling of a contaminant removal process such as a hydrodesulfurization unit can be as simple or as complex as the modeler feels necessary. Through the use of various options within the PIMS system, the modeler can structure the contaminant removal in several ways. The modeling of the severity of process... |
Problem Statement: : | Solution: A typical representation of an HDS unit contains one or more feeds as candidates for removal of the contaminant, in this case sulfur. Usually, there is some fraction multiplier for the sulfur in the product as it relates to the sulfur in the feed. If there is only a single feed, the quality of the product wil... |
Problem Statement: I would like to include the penalty cost for [Inventory level] x [Inventory quality] in my PPIMS model.
How can I create this structure in the model? | Solution: This example is for a Distributive Recursion model - not a PIMS-AO model. In a PIMS-AO model, nonlinear equations could be built onto the model tree to model this. For DR, the tables described below are used.
There is no variable that represents the inventory level directly. However there are two types of ... |
Problem Statement: Which license keys do I need to commute for the various Aspen PIMS features? | Solution: When using SLM Commute, you may see many licenses that do not need to be commuted in order to run the current version of Aspen PIMS. Many of these licenses are present for backward compatibility with older versions of Aspen PIMS. Below is a chart of what should be commuted for various features and model typ... |
Problem Statement: How do I change the system password that was given while installing Petroleum Supply Chain products? | Solution: The system password needs to be supplied while installing V8.2. Most companies require their employees to change their system password periodically. When password changes happen, this has to be updated in Petroleum Supply Chain product services. The procedure follows:
Go to Control Panel and click on Admin... |
Problem Statement: How do I change the database maintenance options using PIMS OLE automation? | Solution: Use the following calls to change the database maintenance options using PIMS OLE automation:
DELETE EXISTING: bOK = iPimsWin.SetIntegerSetting("DatabaseDeleteOn", 1)
PURGE EXISTING: bOK = iPimsWin.SetIntegerSetting("DatabasePurgeOn", 1)
ONLY UNIQUE CASES: bOK = iPimsWin.SetIntegerSetting("OnlyUniqueCasesIn... |
Problem Statement: In Platinum, the Case Runner icons have a pencil image and will appear by some variables such as shown below:
What can cause the Platinum Case Runner icons to not be displayed on the Platinum flowsheet? | Solution: Aspen PIMS Platinum Case Runner requires Windows 7 OS and V8.2. If these conditions are met and you still do not see the icons, this can happen if the Aspentech PIMS Case Runner Web Service is not running.
To verify:
1. Go to Start->Control Panel->Administrative tools->Services window. Users will see on... |
Problem Statement: The existing Aspen PIMS model was built using old Excel format (.xls) spreadsheets. After installing Excel 2010, it can still read the older files in compatibility mode, but this usually slows down Excel performance. If old Excel files (.xls) are saved in the new format (.xlsx), then all the links be... | Solution: Please do the following steps:
1. Save the existing workbook as new format (.xlsx)
2. In Aspen PIMS, go to the model tree, right click on "Tables" and select "Rename a Workbook"
3. The following dialog appear.
Select an existing workbook (.xls) from upper list box then enter a new workbook (... |
Problem Statement: Some users are considering an update of Microsoft office from 2003 to 2007. What is the compatibility of the PIMS products with MS Office 2007? | Solution: Starting with AspenONE 2006.5, all PIMS Family products support MS Office 2007.
Prior to AspenONE 2006.5, the PIMS Family products were not officially tested for compatibility with Office 2007. All the products support and were tested with Microsoft Office 2003.
The PIMS Family products include,
Aspen M... |
Problem Statement: This knowledge base article describes why deleting structures given by Simplify Mathematical Programming System (Simplify MPS) may lead to model execution errors.
Simplify MPS option is used to remove all unnecessary R vectors (error without distributions) successively, from the MPS file until the... | Solution: It is recommended to use Simplify MPS just as suggestions to which structures could be removed from the model. It is necessary to verify that all related distributions in any other submodels or T.PCALC are removed as well.
In below example Simplify MPS shows that four structures can be removed from pool ALK:
... |
Problem Statement: When using valve sizing methods to calculate pressure drop (Delta P) in steady state, changing the Valve Opening % doesn't automatically update the Delta P calculation. | Solution: In steady State, the valve can be used to calculate Delta P or mass flowrate using the valve sizing methods option which is available in Design ll Parameters of the valve model property view. The Delta P that is calculated is a function of valve opening %, therefore when the valve opening % is changed the Del... |
Problem Statement: How do I create a fin data bank? | Solution: Within Aspen MUSE, a databank can be set up containing the information on a number of fin types. The same databank can be used in all Simulation modes (PFIN, MULE and MUSC), and gives a standard set of fin geometry and performance data. Once a fin type has been entered in the databank, fin data need not be en... |
Problem Statement: Some Data Functions in Report Writer that get data from an Aspen ORION Database bring the Date/Time references as Date - Time, while others only get the Date (no Time) as a reference.
An example of the first type is the ATDSOEventDetails() function, which gets two fields called STARTDATETIME and STOP... | Solution: To convert from the MM/DD/YYYY HH:SS format to MM/DD/YYYY format, use the Excel functions CONCATENATE(MONTH(A1), "/", DAY(A1), "/", YEAR(A1)), where A1 would be the reference STARTDATETIME or STOPDATETIME in (MM/DD/YYYY HH:SS) format.
The MONTH(), DAY() and YEAR() functions are Excel Functions and they get th... |
Problem Statement: The ATReplicateSheet(VarParm, MDBFileName) is used to create multiple copies of the worksheet it is located in. It supports two methods of determining how many copies of the worksheet to create.
The first method involves passing an SQL query string as a parameter. The function will execute the SQL qu... | Solution: For this purpose, an SQL query that brings only one column of data will be entered as the first parameter to the ATReplicateSheet(VarParm, MDBFileName) function. The name of the column, defined in the SQL query, will automatically be the name of the Excel worksheet level defined name. This Excel worksheet lev... |
Problem Statement: When running a PIMS-RW template in Excel, the step between selecting the template and selecting the database takes a long time to complete. One common cause of this problem is that the template has path specific references to the PIMSRPT.XLA file. For example, a function reference might look like thi... | Solution: The solution to the problem is to remove the path references so that PIMS-RW does not have to do this. The process to do this is to
Make sure that the PIMS-RW add-in is active. This is done in Excel using the "Tools-Add Ins" dialog box. Simply check the "AspenTech Supply Chain Report Writer" (If that is not a... |
Problem Statement: There have been a couple of cases of users running a PIMS-RW template and discovering that the report has either missing or incorrect data for one or more of the cases. | Solution: The situation is caused by a feature in PIMS that allows the user to change the text description in table case (especially for streams that are in either T.BUY or T.SELL). This results in multiple text descriptions being written into the database table PMSTRMID. When PIMS-RW executes a query against the datab... |
Problem Statement: The tokens show as being consumed when closing the Citrix session, shutting down the PC or logging off without closing Aspen applications.
Root Cause:
The root cause of this issue is due to closing the Citrix session, or shutting down the machine or logging off and not closing the AspenTech applicati... | Solution: We have three possible recommendations that you can apply.
1. Close AspenTech applications before shutting down the machine or closing the Citrix session.
2. Inform all employees or have a warning message appear to notify the user to close all open applications before shutting down.
3. Configure Id... |
Problem Statement: How to add labels to the macros run in LIBDPND. | Solution: In order to add the desired labels, you need to run a macro with arguments for the specialized installation procedure in LIBDPND. A macro with arguments can be run as LM's special installation macro. LM uses <MUTIL DO_CMD ?CMD to fire the macro. ?CMD contains what ever you have in the SPECIALM column for that... |
Problem Statement: I would like to know where Aspen Multi-Blend Optimizer (MBO) and Aspen Petroleum Scheduler (APS) store the state of a Gantt screen. By this I mean whether or not it is in Fit-All mode and if in Fit-All mode which Gantt rows are expanded and which are collapsed. It must store this somewhere becaus... | Solution: Expansions of Gantt items are saved in the following database tables:
GANTT_EXPANSION_EVENTS - For regular Gantt View
GANTT_EXPANSION_RECONÂ - For Model Accuracy Interface
The table may look as below. If the EXPANDED field is "1", the item is expanded. If it is "0", it is not expanded. Missing items are ... |
Problem Statement: Discuss the purpose of INIT Sheet with Aspen Petroleum Scheduler (APS)? | Solution: An Aspen Petroleum Scheduler model has Units.xls as a part of the model. This Units.xls has various work sheets for various modeling purposes. INIT sheet is one among them.
· INIT sheet, is a Special purpose sheet, provides a way to Initialization of certain model elements
· INIT Sheet is ... |
Problem Statement: We are trying and install Aspen Petroleum Scheduler (APS) 7.3.0.3 64 bit on a Win7 64bit machine. The application opens without any problem but, when we try to open a model based on a .dsn file that uses Oracle ODBC, the application gives an error message, because it's not able to find the correct OD... | Solution: There is no 64-bit version of APS. Only 32-bit is available, but it works fine on 64-bit Windows 7 OS.
Aspen Petroleum Scheduler can only work with 32-bit driver of supported Oracle clients. It will not work with 64-bit Oracle clients.
Keywords: None
References: None |
Problem Statement: We imported a crude assay through Excel Integration Utility (EIU) that ended in the number 1 (Assay1).
In EIU we mapped this Assay to CTU1 in Aspen Petroleum Scheduler (APS), including the streams, properties, etc. In APS we were able to build multiple crude units against this one assay without map... | Solution: Aspen Petroleum Scheduler looks at the last digit of the "Unit Id" to get the "Assay Id". Therefore CTU1, 2CTU1, 3CTU1 and 4CTU1 units all would use the Assay Id: 1 to figure out the assays for that crude unit .
User should take care so that the specific crude unit has the required number of streams .
Keywo... |
Problem Statement: This knowledge base article describes how to configure a "Settings" worksheet on a template to be used in Excel Integration Utility (EIU) for Aspen Petroleum Scheduler (APS) and Aspen Refinery Multi-Blend Optimizer (MBO) applications. | Solution: The "Settings" worksheet is mandatory for all workbooks in Excel Integration Utility template.
The "Settings" worksheet is used for the following:
·  Defines units of measure to be used.
·  Maps component rundowns and assays
·  Specifies the Application ID and User ID for updat... |
Problem Statement: How do I disable changes to important tables in the Aspen Petroleum Schedular Model Tree view, to avoid accidental changes? | Solution: Aspen Petroleum Scheduler provides access to Model Tables via Model Tree and Table View.
In this Model tree, there are many groups like ADMIN Group, Model Group, Scheduling Group etc. Sometimes, there is a need to disable some of the Tables to prevent users from accidentally changing or updating the data (suc... |
Problem Statement: Why are no Submodel Model Calculator (SMC) files supplied with the VBDEMOV73.mdb model supplied on production DVDs? | Solution: The VBDemo model doesn't use .smc files. The VBDemo model shows how to use VB units. The Demo model has an SMC folder supplied and the user can combine .smc files and VB units if needed.
Keywords: -VB demo model
References: None |
Problem Statement: Please clarify how Aspen Petroleum Scheduler (APS) recognizes cut data and order when using Excel Integration Utility.
For example, in table CRDCUTX there are different cuts from Assay data. I noticed that when APS maps the information, APS is taking Light Naphtha "LN" as cut number even though "NC1... | Solution: Aspen Petroleum Scheduler (APS) has a unique way of associating assay numbers, stream names and cuts to crude units. You should take this into consideration when defining a crude unit.
Assay numbers are associated with a CRUDE unit by appending the assay number to the end of the crude unit name. The mapping o... |
Problem Statement: I have my Advisor model in a Microsoft Access database. Most of the Advisor reports will not generate when using Aspen Report with this database. Why? | Solution: Microsoft Access is not robust enough to handle the "outer joins" performed in the report generation process. It is recommended that you use either Microsoft SQL Server or Oracle with Aspen Advisor.
KeyWords:
model
microsoft
access
Keywords: None
References: None |
Problem Statement: After importing from Excel Integration Utility (EIU), the Audit Inventory dialog box shows that the Crude composition value is equal to the "Simulated" value, but the total volume or inventory is equal to "Plant" value. Why? | Solution: The way Aspen Petroleum Scheduler (APS) works regarding Audit inventory data is that by default the Value field should be the same as the PLANT VALUE field (imported data). This is true for process tanks but not for Crude Tanks.
With crudes in a tank we use the crude composition of the SIMULATED results and t... |
Problem Statement: Does Aspen Petroleum Scheduler (APS) integration service require a user name and password during installation? | Solution: Username and password is a requirement for the installation of the integration service for V8.2. However from V8.4 onwards, APS integration services will not require user name and password during installation. Customers having SQL or Oracle DBs as their APS model should give read/write access to “Network Se... |
Problem Statement: How do I enable usage log generation on the SLM Server? | Solution: Follow this procedure to enable usage log generation on your SLM server machine.
Check if there is a “SLMServerLogs” folder available at this path: C:\Program Files(x86)\AspenTech\SLMServerLogs\lserv.log
If the folder is not available, create a folder named “SLMServerLogs” at the specified path: C:\Program F... |
Problem Statement: How do I access my personalized Technical Support e-Bulletin page? | Solution: This knowledge base article explains how to access the personalized Technical Support e-Bulletin page that will show recent Patches, Knowledge, and Upcoming Training based on your region and selected My Products.
A summary of the e-Bulletin page content, top product news, and featured training is sent by ema... |
Problem Statement: The status of the Hyprotech SQP Optimizer indicates ‘violated constraints’. However, the current value of the process constraints functions is above the minimum specified in the Derivative Analysis tab. | Solution: One of the reasons why this message can appear is because the user defined their constraints (in the Constraints/Objective Function page of the Derivative utility) as inequalities of the type
Minimum < Current Value < Empty
As a workaround, the user should specify a maximum value for the process constraints, ... |
Problem Statement: How is Mass Flow converted into the Std. Gas Flow [STD_m3/h] variable reported in the ‘Properties’ page of any stream in Aspen HYSYS? | Solution: The Std. Gas Flow is calculated from the specified or calculated mass flow, according to the Ideal Gas law at standard conditions (1 atm, 15 deg. C):
IdealDens = p0 Mw / (R T0)
where,
p0 – pressure at standard conditions (Pa)
Mw – gas molecular weight (kg/kmol)
R – ideal gas constant (8.314 J/mol/K)
T0 – temp... |
Problem Statement: The value of a user property (defined in the ‘User Properties’ folder) is not showing up in the Properties tab of some streams. | Solution: There may be several reasons for this occurrence. First, make sure that the referred property is activated for all streams in the flowsheet (this can be done accessing the Correlation Manager). Then, check the parameter Min. Def. Comp. (%) in the user-property tab in the Properties environment.
This parameter... |
Problem Statement: Pressure assignment in a mixer is either ‘Equalize all’ or ‘Set Outlet to Lowest Inlet’. Thus, the pressure of the mixed stream is either the lowest of all inlets, or all streams have the same pressure. The user may wish to mix a lower pressure stream to others at higher pressure, and have the outlet... | Solution: Instead of using a Mixer, the user should use the Balance operation of ‘Component mole and heat flow’ and assign the desired pressure value to all streams connected.
Keywords: Balance, Mixer, Pressure
References: None |
Problem Statement: Can I include several objective functions in the same optimization problem in Aspen HYSYS? | Solution: In the Original optimizer, the user can only select one objective function. With the Hyprotech SQP optimizer, multiple objective functions can be handled. This option requires the previous setup of a Derivative Analysis.
In the Objective function menu of this analysis, add another ObjFunc.
Keywords: SQP Opti... |
Problem Statement: How to design, rate / check and simulate an Aircooled Exchanger using Aspen Air Cooled Exchanger in Aspen Plus? | Solution: Using EDR (Exchanger Design and Rating) - Aspen Air Cooled Exchanger in Aspen Plus, one can rigorously design and rate an Air-cooled exchanger.
In the Standalone EDR- Aircooled exchanger application air properties (dry and humid) are incorporated within the program, but in Aspen Plus it will be modeled using ... |
Problem Statement: How can I move my hardware-locked license to a Virtual Machine? | Solution: This knowledge base article explains how you can move a hardware-locked network license to a virtual machine.
Before moving the license, please follow these steps:
Step 1: Make sure you have a static IP address and a hostname – When locking a license to a virtual machine, the license is normally locked to the... |
Problem Statement: How do you account for Utilities Consumption for blending? What is the necessary structure to include the utility consumption and report it? | Solution: You need to make changes to Table ROWS, to capture the total blending activity, and set up an additional Submodel to define the utility consumption and report them. It is necessary to use this additional Submodel, as it is the only structure for which PIMS will automatically report Utilities consumptions.
Tab... |
Problem Statement: In Aspen's datasheet for the CIM-IO for Measurex interface, there is a sketch showing the CIM-IO node connected to an Application Manager box. In the manual the connection seems to be to any type of box called ODX Device. What are the specifics of an "ODX device"?
An MxOpen network also contains a Ro... | Solution: The manual depicts a simplified sketch in the datasheet. The requirements section of the datasheet is the definitive listing of required software. The ODX Application Manager software is required to communicate to the CIMIO ODX interface and manages multiple ODX client requests to access data from MxOpen LAN ... |
Problem Statement: After installing a standalone license file successfully, the old license file is still active. | Solution: In this situation, the aspenONE License File Installer was used to install the new standalone license file. The picture above shows the installation was a success, but Aspen HYSYS is still using the old license file and the AspenTech License Expiration Reminder continues to detect the expiration to be the yea... |
Problem Statement: This article explains why the Output Database tab is greyed out and how to correctly access the settings to modify your database options. | Solution: Output Database information will be disabled when the Model Execution Dialog box is open. You will find that when accessing through Model Execution Dialog Box > Settings > Output Database, you will not be able to modify any of the parameters for that particular tab.
You need to access through Model Settings ... |
Problem Statement: How can I include hydraulic head in Aspen Plus Dynamic? | Solution: In Aspen Plus, the hydraulic head is seldom considered when equipment is mounted at different height. However, the hydraulic head may have noticeable influence on dynamic run especially for liquid system. As a result, you may have to consider it when transferring a steady model to a pressure driven model of A... |
Problem Statement: Windows Installer error code 1618 is displayed when you try to install aspenONE Products. This occurs when more than one installation is running at the same time. For example, this can happen if you install aspenONE Products at the same time that Windows is installing updates.
To resolve the problem,... | Solution: 1. Cancel current aspenONE Installation
2. Press Ctrl+Alt+Del and start Task Manager
3. End the MSIEXEC.EXE processes
For Windows 7
In the Processes tab, select MSIEXEC.EXE, click End Process
For Windows 10
In the Details tab, select MSIEXEC.EXE, click End Task
4. Install aspenONE products
If this so... |
Problem Statement:
When using Compliance.21 to receive alerts via email, in some cases the emails are treated as Junk Email by Outlook. | Solution:
Occasionally Outlook does not recognize the “From” address used by Compliance.21, as for any alert it will always use the email format “Compliance.21@DatabaseName”. This format is hardcoded, and it cannot be changed.
The solution is to configure the rules in Outlook to make messages delivered by Compliance.2... |
Problem Statement: Aspen OnLine: Access denied exception may occur when an Aspen Plus EO model is used in an Aspen OnLine project during offline-to-online operation or when Aspen OnLine engine runs the EO model. | Solution: When attempting to move a model from the offline folder to the online folder using the Aspen Online Offline-to-Online utility, users may receive the following error message:
Starting offline-to-online operation...
Model name: column_V84.bkp
Copying files to online directory ...
Files copied to online directo... |
Problem Statement:
Basic steps to identify the possible root cause of a Cim-IO connection failure. | Solution:
(A) = Cim-IO Server
(B) = Cim-IO Client or InfoPlus.21 Server
1.- On (B) verify that the TSK’s assigned to the Cim-IO connection are running in InfoPlus.21 Manager. Typically, this TSK’s can be found as TSK_A_XXXX, TSK_M_XXXX and TSK_U_XXXX.
For every TSK assigned to the Cim-IO connection, there should be... |
Problem Statement: What equations are used in the Vessel Sizing Utility? | Solution: The attached document contains the equations used in the vessel sizing utility.
KeyWords
Vessel Sizing, Utility, Separator
Keywords: None
References: None |
Problem Statement: How to submit an online evaluation request. | Solution: You can submit an Aspentech Software Online Product Evaluation Request
1. Go to https://esupport.aspentech.com/
2. Select Support Menu in the top bar.
3. Click on Software Evaluation under the Software Services
4. Select No Account if you are a new user or Login if you are a customer.
5. Complete the... |
Problem Statement: How is PIMS Submodel Calculator Used? | Solution: The Aspen PIMS Submodel Calculator (SMC) is a tool that allows Aspen PIMS submodels to be evaluated in isolation. SMC is used for model validation and quick simulations. With SMC, a modeler can also integrate an Aspen PIMS model with other applications, such as Aspen Petroleum Scheduler. The Aspen PIMS Submod... |
Problem Statement: There are two type of sales data in AFO, one is ADS, another is expected sales in DQM.
What is the difference of them? Which is used to generate replenishment plan? | Solution: ADS is stand for average daily sales, which is the average of the third week's sales data.
Expected sales is also called forecast sales, which is calculated with the entire four weeks' sales data and also consider the setting in Storm & Holiday Planner.
Expected sales could be check in Customer Setup Report.
... |
Problem Statement: When there are no default rules or tank beginning value, is there a way I can verify Aspen Refinery Multi-Blend Optimizer (MBO) is using 0.012345 as the property value? | Solution: In the MBO help file section for Rundown: Component you will find that for regular components if there are no component default, property default of tank beginning values, MBO will use the value 0.012345.
You can verify this value is used by MBO with the following steps:
In the Multi-Period Blend Optimizatio... |
Problem Statement: How to add blenders in Aspen Petroleum Scheduler and Aspen Refinery Multi-Blend Optimizer? | Solution: Use table BLENDERS to list the blenders that are available for use in Blend events. On the Aspen APS or MBO Model Tree, select Data Tables | MODEL | BLENDERS. Enter the information for the blender in a new row.
Once you have entered the blenders, go back to the Model tree menu and right click on “BLENDERS... |
Problem Statement: How can I adjust characterization results for a crude cut in my PIMS model using Aspen Assay Management? | Solution: Here are the steps to modify a specific value for a property after characterization has been performed:
Note property values for a particular crude in Model Assays section. For example, look at RONclear value for WN1 cut of Alaskan North Slope.
In PIMS Tables section, go to Cut Crudes and under “Action” colum... |
Problem Statement: This article explains what happens to crude composition trends when you add crude tanks into #MIX section in Aspen Petroleum Scheduler. | Solution: The use of crude tanks in #MIX section is not supported. The feeds to a #MIX calculation can only be process tanks and streams. Adding a crude into #MIX will cause the crude composition trends to show incorrect results. For example:
Correct: Crude composition trend without crude tank T011 in #MIX after simul... |
Problem Statement: Can Aspen Engineering Suite products utilize GPU acceleration? | Solution: The calculations performed by Aspen Engineering Suite (including Aspen Plus, HYSYS, Aspen Custom modeler, etc.) are not amenable to GPU acceleration. GPU acceleration is meant for doing the same operation on a large number of values, which is not the kind of calculation that Aspen Engineering Suite does.
Fo... |
Problem Statement: Example LNG User Variables - Relating Heat Leak and Delta P to flow rate of feed stream | Solution: In heat exchanger operations (Cooler/Heater, LNG exchanger, etc.), the values of pressure drop and heat leak are needed to calculate to operation. Although, the pressure drop and heat leak are dependent on flow rate of fluid passing through it. Therefore, pressure drop or heal leak should not be keep fixed, i... |
Problem Statement: What are the main differences between Scripts and Tasks? | Solution: 1. A script is a set of instructions that automates the setup and control of an entire simulation, while a task is a set of instructions that defines a sequence of actions that take place during a dynamic simulation. For example, you can use scripts to automate specification and initialization, define units o... |
Problem Statement: What do the five Reset options in Equation Oriented do and How should they be used? | Solution: In an Equation Oriented (EO) flowsheet, when the reset button is hit, a dialog box with five options is displayed. The option you select should depend on the level of changes you have made to the flow sheet.
If you have added and connected a new block or made changes to a stream or block input form then y... |
Problem Statement: When using Aspen Audit and Compliance manager, it may be difficult to visualize its content in the Event query site (http://<ServerName>/AuditComplianceManager/EventQuery.asp). This solution provides the steps needed to fix this. | Solution: Go to Internet Explorer Tools | Compatibility View Settings and add the server name to the list in the Settings window as shown below
After that, reload the AACM site and you should be able to visualize it properly.
Keywords: Aspen Audit and Compliance Manager
References: None |
Problem Statement: When executing the setup.exe from the AspenONE_MSC_T installation media folder you get the error message shown below, even after you have verified that software requirements for the version you are installing in the AspenTech Platform Support are correct (https://www.aspentech.com/en/platform-suppor... | Solution: To avoid this issue, use antoher unzipping tool, such as the one that is downloaded from the AspenTech Download Center if Selected
Keywords: Version of this file is not compatible
MSC install
References: None |
Problem Statement: This solution provides example on how to get interpolated data from Aspen InfoPlus.21 database for applications using ODBC connections based on method described on solution How to access the AGGREGATES and HISTORY pseudo tables in ODBC aware application. This example will use Excel 2013 as applicati... | Solution: On Aspen SQLplus:
1. Create a query to the history table containing the interpolated data from the tags you want information:
(Refer to SQLplus Help files to get more information about HISTORY table parameters to use on it, also check solution 105128).
2. Create a VIEW of the result by adding CREATE VIEW <V... |
Problem Statement: When you try to use built-in functions (e.g. sin or cos) within a calculation in Aspen Calc and execute the calculation you may get the message:
"Failed to create object : CalcBuiltinFunctions.clsFunctions in formula <name> at line nn" | Solution: This error might be caused by a problem with the CalcBuiltinFunctions.dll and CalcFunctions.dll files. Re-registering those dll's will resolve the error.
Open a command prompt and navigate to the "<drive>:\Program Files\Aspentech\Aspen Calc\Bin" folder and run the commands in following order:
regsvr32 /u Calc... |
Problem Statement: This solution provides a brief example on how to create a dashboard for an aspenONE Process Explorer graphic providing example on the use of settings like:
a) Scale: The whole range of values displayed by the dashboard including uppers and lower limits.
b) Limits: The color indication of the value st... | Solution: Adding dashboards for an aspenONE Process Explorer’s graphic
Open Aspen IP.21 Browser Graphic Studio and start a new project:
Locate the Dashboard Componets icon and click on it:
Select the type of dashboard to add:
Adjust the size and position of the dashboard:
Select the dashboard with a left cl... |
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