AIMMS Language

Hi,I have a problem with seeing detailed results in my AIMMS program. There are no errors and I get the result for the total cost minimization, but I cannot see any detailed data. Can anyone help me with that? Link to Google Drive with data and program:https://drive.google.com/drive/folders/1QvAuq8sTMautsUEm-3i42Si_1ObSICBe?usp=sharing

I use AXLL::ReadSet to read the set element from Excel:And in excel the rank is  However, the data in the set looks like this (the data is in a wrong ranking):Sometimes, it ranks like this:Even though I define the elements directly:Still, the data looks like this:I have ever encountered this problem before, and I was told to define the set as a subset of Integers and use Order by. However, I hope the data in the set is treated as element rather than value. So for a set Time := {1,3,5}, Time(1+1) := 3.What wrong with this?

I am trying to develop a model and store the output iteratively. The code I have written is given below. I am trying to store the output “poFGAllocation(sr,d,p,b,f,n,a,s,l)” iteratively. Model is running and showing optimal solution. However, the output parameter returns empty dataframe. pLoopCount is a parameter with initial value 1. while (pCardFG > 0) do for sr do pr_Read_Input_Data; solve mpMaximizeWagonCap where MIP_absolute_optimality_tolerance = 0.05; showProgressWindow(); !vFGAllocationTonsLoop1(xy,sr,d,p,b,f,n,a,s,l) := vFGAllocationTonsLoop(sr,d,p,b,f,n,a,s,l); poFGAllocation(sr,d,p,b,f,n,a,s,l) := vFGAllocationTons(d,p,b,f,n,a,s,l); sFGLoaded := sFGLoaded + {f| sum[(d,p,b,n,a,s,l),vFGAllocationTons(d,p,b,f,n,a,s,l)] >= 0.99}; sFG_ID := sFG_ID - {f| sum[(d,p,b,n,a,s,l),vFGAllocationTons(d,p,b,f,n,a,s,l)] >= 0.95}; endfor; pr_Write_Output_Data; execute("cmd.exe /k 1interProcessData.bat", wait: 1, minimized:1); pLoopCount += 1; endwhile;Kindly help if I am doin

Storing data in so-called cases is the proprietary way of AIMMS to store snapshots of data.For instance, to limit the size, but also to permit loading data for just a selection of identifiers, so-called Case Content Types can be used. Consider a simple application, having scalar parameters a, b, c, and d.  c is the only defined parameter and has definition a * b.Filling in 3,4, and 5 for a, b, and d respectively results in the following screen shot:  With the WebUI data manager, and as Case Content Type: { a, b }, we can save the case.  And this will just store the data of parameters ab, in case ab.data: Now closing the app, and restarting it, we can load this case again.  This will result in the following screen shot: Note:The parameters a and b got their values, because they were stored in the case. The parameter c got its value, because it is a defined parameter. The parameter d did not get a value; it was excluded from the case content type. The following annotated code shows how t

Hello,Is it possible at all to recover unsaved development after an AIMMS / system crash? Thanks!Barry

Recently one of our customers encountered a REST API that didn't accept Json UTF8 files starting with a Byte Order Mark (BOM). By default, the PUT files created by AIMMS are UTF8 files with a BOM at the start to mark these files as UTF8 files.There are some ways to circumvent this issue:Set the hidden AIMMS Project Setting "Default output character set” to UTF8NoBom. Use the function dex::ConvertFileToEncoding(inputFile, inputEncoding, ouputFile, outputEncoding, noBOM) to convert a file. The .json files created using dex::WriteToFile(dataFile, mappingName, pretty) are UTF8 files without a BOM.

I have a stochastic optimization model wherein two-stage SP is not applicable. As such, I want to utilize sample average approximation for my solution to consider at least 100 scenarios with equal probabilities then arriving at one single solution. Is this kind of methodology default in AIMMS? Or are there things that I should do first before doing so?

Hi,I am trying to write a constraint with index domain on certain indicesvBinary1('1') + vBinary1('3') + vBinary1('5') = 3 * vBinary2;‘h’ is the index. Here ‘h’ is taking value {‘1’, ‘3’, ‘5’}. Do not consider it as ODD. I tried with ```index domain: | h in {"1", "3", "5"} sum[h, vBinary1(h)] = 3 * vBinary2;```It is giving errors by saying The scope of index "h" has not been specified. Help to understand it. Do not define another set for these indices only. That I know how to do it. 

Hi, is it possible to define a complex variable in AIMMS?

There is an original expression:W = xyW, x, y are all variables.Now I want to define a function which relax the product of two variables into two inequations:f(AB)={AB* >= A+cB; AB*<= dA+eB} (A,B are input variables and c,d,e are parameters)After defining the function, I want to write the primal expression to:W = f(xy).So the W can be relaxed into two inequations by AIMMS automatically.Is it possible to achive this purpose in AIMMS? Or I need to do the function manually and input the inequations on my own?

May I know how to solve the duplicate column error since I have put the Xconstraint(i,l,g,g0) so that duplicate column does not occur? Whoever is the sender Q(i,l,g,g0) of the product cannot be the same one who is receiving the product Q(i,l,g0,g) to satisfy the local demand. May I know if there is any other way to solve this problem instead of using the constraint such as X(i,l,g,g0) + X(i,l,g0,g) <= 1 since the system does not apply this constraint at all?

I currently have a study concerning bi-objective optimization. To give context, the two objectives are to minimize total cost and to minimize the average travel distance. As of the moment, I am only a beginner in using AIMMS and I only know how to use it for single-objective problems. I just want to know if it is possible in AIMMS to do multi-objective optimization? If yes, how can I do it?

I’m currently doing an optimization model through AIMMS and I want to consider multiple scenarios for my study. Is it possible that I have considered, for example, 100 scenarios and my decision variables will only arrive at one solution that considers all scenarios?In my case, I only have one varying parameter (waste generation) in each scenario. I just want to clarify if it is possible in AIMMS and I want to know how it happens that it will arrive only at one solution. It would be a great help if you can answer my query. Thank you!

When I use the "DistributionInverseCumulative" function for beta distribution, I get the following error message from Visual C++:--Assertion failed!Program: ...Aimms\4.85.5.3-x64-VS2017\Bin\libaimms3.dllFile: c:\gitlab-runner\builds\pvap61xc\0\aimms\a...\beta.cppLine: 173Expression: istat==0--In the MainInitialization I implemented the function as follows:b_p_1 := 6;b_q_1 := 3;b_a_1 := 1;b_b_1 := 5;for n doy(n) := DistributionInverseCumulative(Beta(b_p_1,b_q_1,b_a_1,b_b_1), Uniform(0,1))endfor;For other distributions (e.g. normal distribution) the "DistributionInverseCumulative" works without any problems.I would appreciate any pointers on what I should do so that this function doesn't produce an error message?

I am trying to open a project that was originally written in version 4.37. However I have a Community License so the earliest version I can use is 4.77. I have tried opening this project in both 4.77 and 24.2 and both will crash upon opening the project with no error message.I understand the large difference in versions may be causing an issue but I have no way to test on earlier versions. Is there any way I can identify what exactly is causing this issue and could it be something other than a version issue?

Hi! Does anyone know how to interrupt the calculation process and display the current results?

Hi all, I am aware that AIMMS will use all of the indices specified on the Left Hand Side of an assignment statement to loop over all combinations.When trying out something in a test project I am working on, I wanted to use this logic, but found that this does not work anymore when you are using formatstring on the LHS. Was wondering if this is on purpose or whether this behavior should be possible Example that works:spStringParameter( StringToElement(sTargetSet, iSource, 1) ) := formatstring("Test :: element %e", iSource) ;  Example that does not work:spStringParameter( StringToElement(sTargetSet, formatstring("%e", iSource), 1) :=  formatstring("Test :: element %e", iSource) ;  When running the second one, I get an error indicating that the scope of iSource has not been specified. The above is a minimal example of the problem, not completely the same as what I had. I can work around it by either putting the statement in an explicit for-loop, or create the mapping isource → itarget in

dssuc::PR_UserManagement_Intilization(    LP_Set_IsDeveolperDetails_Required : 1 ,     Sp_thisappallowed_for_nonemployee : "Yes" ,     LS_ADGroup_Usageallowed           : {'E.G','C.G'},     LS_ADGroup_Trainingallowed        : {'E','T.G'} ); PR_UserManagement_Intilization is procedure taking 4 arguments and last 2 is sets.  I am trying to pass sets as shown above and shown belowdssuc::PR_UserManagement_Intilization(    LP_Set_IsDeveolperDetails_Required : 1 ,     Sp_thisappallowed_for_nonemployee : "Yes" ,     LS_ADGroup_Usageallowed           : data{'P.G','R.p'},     LS_ADGroup_Trainingallowed        : data {'P.G','R.G'} ); Its showing errorerror for first one is The 'LS_ADGroup_Usageallowed' argument expects a direct reference to an identifier. data is not expectedPlease help me to resolve this issue 

Now and then, at AIMMS user support, we get questions about creating archives and extracting from archives. I briefly summarized some options available here as illustrated below.After executing the four buttons, the contents of sampleFolder are copied to sampleCopyFolder. 

Dear AIMMS Community,Does anyone have any tips/documentation/experience for moving parameters and data to a different CDM category? (or, perhaps alternatively, create a new parameter in the correct category and then migrating the data). As background: for a customer we are using scenario functionality, with each scenario consisting of 3 CDM categories: master data, dynamic data and planning data. Scenarios can share the same version of this data, e.g. 2 scenarios using the same master data but different dynamic & planning data.Currently the customer doesn't use this option of shared data, because a few parameters within the master data category are actually dynamic. So we want to move these parameters (or perhaps solve it in a different way?) Does anyone have experience with moving data to a different category? We already have many scenarios that we want to keep, so anything we do should leave those intact (in theory that should be possible, because currently none of the scenarios

We've published a 'starting point’ for all things related to data integration with AIMMS. It includes a Data Integration Helper that can guide you towards the right solution for your scenario, including a step-by-step guide on how to implement that route. We hope this helps you taking the first steps towards (upgrading your) data integration with AIMMS 🤗. Take a look here!

Introduction:In the ever-evolving realm of mathematical modeling, efficiency and precision stand as central pillars. AIMMS, through its Developer License, unveils a revolutionary asset: the Math Program Inspector. More than a mere addition to the modeling toolkit, it acts as a dynamic catalyst, propelling model development towards greater speed and robustness. In this exploration, we delve into the core of AIMMS Math Program Inspector, unraveling its significance and tangible impact in the real world.Within a landscape where efficiency dictates success, the Math Program Inspector positions AIMMS as a frontrunner among its competitors. Unlike traditional methods of model analysis that often entail laborious scrutiny of extensive text outputs, this tool presents a visual and streamlined approach, empowering developers to comprehend and traverse models with unparalleled ease. Whether the task involves incremental adjustments, pinpointing numerical intricacies, or resolving infeasibilities

Hi All,I’m trying to write a parameter with dex using dex::WriteToFile() procedure. The parameter has an index year that is a subset of the calendar year. (simple calendar with unit year). The excel download won’t fill the year column (see screenshot below). I have the latest .dex library 23.1.1.2).  Could anyone explain what went wrong here?

Hi Community.. Please how can i create a sen and subset with 10 Cities? where the Citie 1 is the Depot? ..