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I want to clarify the main advantages of installing Pro platforms as a cluster. Is the load distributed when solving tasks(make jobs) on several nodes or is there a link directly to one node? And is it also better to use NLB for balancing, or use a simple round robin by DNS?

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)<=CapConstruir(c,t,s); }   Thank you

Hello everyone, I am currrently doing a project for my university and  I have this type of error :  CPLEX cannot handle MIQCP models with quadratic equality constraints like 'BtoWCosts_definition(91789)'. I checked all my variables and my constraints but couldn’t find any “quadritic” ones.  And the error message tell me the error is in the definition of the variable “BtoWCosts” but again I can changed a lot of thing  and It still didn’t work.  Here is the definition “ BtoW(W)* (NumberTrucks(W)*Truckload(W) )” where Btow(w) is binary and the 2 others Intergers… Thanks You in advance, Yoyo1

In my application, I need to do some stuff with subsets of different sizes of some superset. So I created a set containing the sizes of the subsets and loop over this set of sizes. In each iteration, I extract the subset from the big set using NBest procedure. The sizes of the subsets are ordered in descending order. The use of NBest raises the warning “The local index "_i_SizeOfSubset" is modified inside the for loop.  The condition of the for loop will be re-evaluated, which can be time consuming.  For details on this warning message see the help of the option warning_time_consuming_for_threshold.”. I don’t understand why _i_SizeOfSubset needs to be modified if I pass it to NBest. Using val(_i_SizeOfSubset) does not help either. Could somebody explain to me please, why the warning is issued, and how this could be formulated without modification of _i_SizeOfSubset inside the loop? Procedure PR_SampleLoop { Body: { _S_SizeOfSubset := {1 .. card(S_BigSet)}; for (_i_SizeOfSubset) do !Rai

What is the best practice for transferring user cases when publishing a new version of an app?

AIMMS programını öğenmek istiyorum.Bunun için yol gösterirmisiniz.Bir de AIMMS programını iş hayatında da kullanabilirmiyim.Uygun mu iş hayatında kullanmaya.

Hi,   I have built my first AIMMS model and it is running without any errors now. However, it does not read my excel data and therefore I do not get any result. I was wondering what could be the problem. Do I need to save the project and the input excel sheet in the same folder?   Thank you very much in advance!  

Hello, i am new to aimms and completed the beginners tutorial and tried to understand the machine planning example, but it was to complicated for me to understand all of it. I want to solve a scheduling problem but i have problems creating the model. Let me explain my situation: In the production there are build articles from different orders and they are transported inside the company within containers. The transport limitation is 8 containers an hour. I want to solve the problem and want the best order which is <= 8 containers an hour, if not possible, than the next following orders should be so small, that it will be compensated, if not possible, a gap with no production time should be inserted. It would be ideal, that the same article is produced in one step (e.g. Article 52107 has to be build for 3 different customer orders). After all, i want to visualize it. My first problem is, that i don’t know how to produce on order after another and make the timeline to calculate the dem

How do I open the page “Managed Requests” of AimmsProGUI or something equivalent of it in WebUI?

I am new to AIMMS and  I want to try out the examples from the Homepage, but when I open them I get the attached Error Message. Can someone please help me out?  

Hello everyone,  I face some issues to implement a constraint on AIMMS.  Just to introduce you the problem:  Y(o,l,t) is a binary variable which is equal to 1 if a liquid l (a beer) is ready in tank o at period t; Delta(l) is the fermentation time for a liquid l; How can I implement this constraint?  Thank you for your help.  Regards

I am using the axll library to read my excel database into the Aimms. The number of observations in my database can change each time before running the model in Aimms, and I do not want to make changes to the datareading procedure each time. So, in the datareading procedure (which uses AXLL library) I set the reading row to a bigger number than the maximum number of observations to always read all the database no matter how many observations are in my database.  For example: for an specific identifier, I can have 1 up to 5 rows of data. so I set the excel range as A1:A5. The problem is that I get warnings that the empty rows are ignored. ReadList : Cell A6 in ActGrouping: Remaining rows are ignored after empty header cell. I know this warning is not affecting my model but I just want to get rid of this warning so I can focus on other real warnings.  p.s. I already turned off all warnings from Project Option menu, but still I get these axll warnings.

Hi, Is it possible to add a sound to the WebUI? For example, you press the optimization button in the application and when the optimizer is finished the sound will pop up.

Dear AIMMS Community:   I am using BARON solver to solve a continuous non-convex optimization problem. In small cases, I can see that BARON is finding the global optimum and wherever it is verifiable I am verifying that the results are consistent. So I believe my current modeling is correct.   However, for larger problems, although I get a feasible solution, I don’t have any upper bounds (this is a maximization problem). I found this post, and tried problem.BestBound, which gives NA as answer. How can I fix this issue? Many thanks for your time!

Hello,  I would like to create a project with AIMMS about transport problems. All my figures are in an excel table. How can I rearrange my table for use in AIMMS?  I have successfully added the AIMMS tool to my Excel spreadsheet.  Thank you in advance.

Hi! I have just build my first model on AIMMS and when I tried to run the model, the next following error appeared:   If the option “Data management style” is set to “Disk files and folders”, the procedure CaseCreate is not valid.   Would anyone know how I can solve this problem?   Thank you very much in advance!

When I create a project in a folder, which is synced by OneDrive, and I try to add a widget in the WebUI, I get the following error message: “awf.state: Problem writing ‘MainProject/webui.json’ on the server (500: boost::filesystem::create_directory: Eine Datei kann nicht erstellt werden, wenn sie bereits vorhanden ist: [...])’ (translates to: “a file cannot be created when it already exists”). I can continue working in the WebUI, but when I close the project, all my work is lost. I do not experience the problem, as soon as I move the complete project folder outside of OneDrive.  Does anyone else have the same problem? AIMMS version: 4.71.6.8 (64-bit)

Hi everyone. I'm starting with Aimms, I have two questions   First How can I index a variable with an initial value or constraint? . For example X (i) is the dependent variable of the set (for example 4 things) with index i. And what I need is X (1)> = 50 X (2) <= 250   Variable X {     IndexDomain: i;     Range: nonnegative; }   Second How can I implement or call benders decomposition modules, stochastic programming etc. inside the MainExecution procedure? Thank you Thanking you for your support.

Hi, I want to solve several GMPs at the same time. I adopted AsynchronousExecute AIMMS example to my code. From the progress window I can see that all GMPs get to an optimal solution. However, I can only retrieve the solution of the last GMP. Here is my code: I generate 3 GMPs, resolve them, and create one solversession for each of the GMPs: periods := 3; for (i in periods) do myGMP(i) := GMP::Instance::Generate(myMathProgram, "myGMP_" + i);ProgressWindow := GMP::Instance::CreateProgressCategory(myGMP(i)); presolved_myGMP(i) := GMP::Instance::CreatePresolved(myGMP(ip),"presolved_myGMP_" + ipss); SolverSession(i) := GMP::Instance::CreateSolverSession(presolved_myGMP(i),"SS_" + i); GMP::Solution::RetrieveFromModel(presolved_myGMP(i),1);GMP::Solution::SendToSolverSession(SolverSession(i),1);GMP::SolverSession::AsynchronousExecute(SolverSession(i)); endfor;   Here I wait until all asynchronous solversessions are solved. GMP::SolverSession::WaitForCompletion(AllSolverSessions);   Here I wan

Dear all My mathematical problem is to schedule the device in a home to achieve the minimum cost during a day. I divide a day into 24 time slots.  Each device with have its own Power rate and length of operation time. Main variables in my problem are starting time of devices at which a device is started to run. When I run my program, starting times of devices are always at time slot 1 and these are wrong results. I do not know why my program give wrong results. Here is my program Model Main_Test_starting_time {     Set Time {         Index: t;     }     Set Devices {         Index: d;     }     Parameter Price {         IndexDomain: t;     }     Parameter Power_rate {         IndexDomain: d;     }     Parameter Length_of_operation_time {         IndexDomain: d;     }     Variable Starting_time {         IndexDomain: d;         Range: {             {1..inf}         }     }     Variable Energy_consumtion {         IndexDomain: t;         Range: nonnegative;         Definition: sum[d, if

Hi, Through reading AIMMS user’s guide, I wonder how to create a library under the project library folder? Moreover, if the new library was already created under the main AIMMS project, is there any other method I could use to make changes?   Thanks!

What is the status of the Deprecation of “Horizon data types”?

Dear all   I have two variables: X and Y with index domain t. I want to write in definition of X such as X[0] = 0.3 X[1] = X[0] + Y[1] X[2] = X[1] + Y[2] …. How do I write in definition part of variable X ? Please help me   Thank you so much

Hi all, tried to declare a new set with index d. Aimms complained that index d was already used BUT it is not used anywhere in aimms. I just can’t find any sets with index d. Tried also index s; same complaint from aimms. I opened another similar project and I was able to create sets with indices d and a. Not sure what’s happening. Any suggestions would be appreciated    thanks   nick  

  Hi dear community, I would like to know how AIMMS generates the Display Model. I want to check if AIMMS is reading my model correctly.