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Topics about getting started or leveling up as an AIMMS developer. Datalinks, AIMMS language, building apps...

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MINOS Warning: Model status 13: Error no solution, Solver status 9: Error: Setup failure (see message window).

Dear AIMMS Team, I am a PhD student in the UK and I have been trying to solve a non-linear non-convex optimisation problem with different solvers for a Journal Paper. The following are the CPU details: Intel Core i7 2.2GHz, 16GB RAM memory, 64-bit operating system. So far the solvers CONOPT 4.0 and...

How to Link to Excel Files

The AimmsXLLibrary was introduced in AIMMS 4.20. You can deploy your AIMMS project to more platforms with less restrictions, because this library can communicate with Excel files in server environments where Excel is not installed. For instance, while running AIMMS through a WebUI on PRO or on Linux...

How to get a variable range subset of a set?

Hi,I am working on a project of delivery planning.In my model i have a constraint which defines the Unavailability of a vehicle for some time due to maintenance or already on a delivery. The Time a vehicle becomes unavailable is a parameter.the constraint is :Here,X_v,t → indicator variable for main...

Overview: Deprecation of Compound Sets

In May 2018 AIMMS announced a plan to deprecate compound sets in stages. Support for compound sets will be fully deprecated after January 1, 2020. To find out how to identify and remove compound sets from your model without losing functionality, read AIMMS Knowledge: Prepare for the Deprecation of...

writing for loop

Dear, I want to do a cycle for. I have two boundary values and I want to consider values between these boundaries. Then for these considered values I want to solve the Min_Total_Costs and have the values of Total Costs for the considered values. How can I write this cycle for? How can define set, ec...

4.70 Release won't open WebUI

I am getting the following error when I try to open a project in 4.70: This project (with WebUI) opens just fine in 4.69. What needs to be fixed? And how can I fix it?

summation constraint

Hello everyone the following constraint 0<= P_cotw <= sum PMAX_c 'tau' w 'tau<=t How can I declare the right side of the restriction c, o, t, w subscripts. 'tau' t = {1,2} My case is: Constraint LimProdCan { IndexDomain: (c,o,t,s); Definition: PotGenCan(c,o,t,s)<=CapCon...

Giving Parameters Dynamic Values

Hey everyone, I´m currently using Aimms to build a model for my Bachelor Thesis. I have never worked with Aimms before so I´m pretty clueless in some regard. So my problem is the following constraint: sum + sum [j, sum [m, aFP(h,m)*(y(j,m,t))]] <= Capacity(h) Here x(i,t) and y(j,m,t) are the...

write a code

Dear all, I want to write a code in the MainExecution section. I want to consider in the first cycle a constraint, but I wan't to consider this constraint in the second cycle. How can I write this? Thanks Best GL

Generate combination of integer parameter

Dear All, I want to generate an integer parameter based on the combination of a number of component as shown as: K1 K2 K3 C1 1 1 1 C2 1 1 0 C3 1 0 1 C4 1 0 0 C5 0 1 1 C6 0 1 0 C7 0 0 1 C8 0 0 0 where K1 … Kn is the number of component and C1 .. Cn is generated combination based on component numb...

How can I get more than a handful of buttons across a group?

I'm liking the group widget in WebUI, but I'd sure like to put more than a few buttons across it. I want to have a row of buttons all the way across the top of the page, and the only way I can get the buttons to not be 2 columns wide each is to use a group. But the group cuts off any buttons tha...

How to set Stop Criteria for Math Programs

When you solve a Mathematical Program in AIMMS, the default behavior is that AIMMS will let the solver solve the problem to (local) optimality. There might be situations where you want to stop the solve procedure after a set time period, or once a solution within a given percentage of the best value...

VS Code Syntax Highlighting for AIMMS Text Representation

Is there an extension or language config so I can view my AIMMS Text Representation with syntax highlighting in VS Code? It would be super helpful. I think I can create one, but if someone's already invented that wheel, no sense in re-inventing it. Thanks, y'all! ~Bon

Aimms returns the same Opt solution for different cases (data)

I am trying to solve an MIP model with AIMMS. I run the AIMMS for a specific parameters and obtained the optimal solution; I also solved the model with same data/parameters using a heuristic to test the optimal solution- it is indeed the optimal. Now I first change the parameters (i.e., using differ...

non anticipativity constraint

Dear all, I must to set the non anticipativity constraints in aimms for the stochastic problem.Then for s scenarios and x decision variable I must to write thatx1=x2=x3=..xsHow can I write this in aimms?Thanks

How to do Equality Calculation

Dear all, I have a matrix T(i,j,k,s).I want that for each s, i and j are equal.How can I do this?Best

How many rows to read from an excel file (axll)?

Hi, I have a question regarding some best practices in terms of reading excel files with the axll library. Here, we have to specify the header / dataranges before reading. Often, we don't know exactly how many rows of data we have. We can of course set the max row number arbitrary large (or to the e...

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