Optimization Tooling

Hello, everyone！Now I have a problem about how to set ranges for specific values of a variable. I have a variable “Cmatrix(t,x,conv) ” and “t,x,conv” are some sets.  I need that Cmatrix(t,x,conv) ∈ [-1,1] only when conv ≠ 'Heat_pump' . And Cmatrix(t,x,conv) >1 only when conv = 'Heat_pump'. How do I write this in the red box? When I set a constraint to bound the “Cmatrix(t,x,conv) ”, there will be errors as “The solver CONOPT 4.1 cannot handle the ranged constraint Cmatrix_except_HP(1,Elec,CHP_engine) in mathematical program "Cost_minimization"; please define the middle term as a variable and add bounds.” Can some kind person save me? Thank you so so so much! Wish you happy every day.

New internal demo and here I am to share! Remember what I share here is not (necessarily) released yet and can change or even be discarded! I just give the scoop.Connecting the dots is a new functionality in the combination chart that can allow you to “connect the dots” quite literally! So if you have a line chart and have missing data (for some x values), you can still connect the data that is present.Example of connecting dotsAutomatic conversation of classic charts to new combination chart! I really appreciate the effort into building this functionality making life so much easier, but still maintaining the original chart so you'll always be safe in using this. I also enjoyed the improvement to table filtering explicitly separating regex functionality from others. This is already released:  https://documentation.aimms.com/webui/table-widget.html#regular-expressions

Hiya! I’m completely new to AIMMS so apologies if this is a really fundamental thing to ask. I’ve been working on a model that I would like to call from within Python using AimmsCmd - for now while I’m just trying to get it to work, my code in Python linking to AIMMS is pretty much identical to the script in the guide to running batch commands:aimmsPath = "C:\\Users\\44750\\AppData\\Local\\AIMMS\\IFA\\Aimms\\4.77.4.5-x64-VS2017\\Bin\\AimmsCmd.exe"command = aimmsPath + " solver.aimms < cmds.txt > log.txt"solve = subprocess.call(command, shell=True)log = open("log.txt","r")print(log.read())log.close()When I execute it however, I get this error:Error: Unable to open AIMMS with "--as-server --ignore-dialogs --hidden  "solver.aimms"": Starting up Aimms failed. Program initialization error.Thinking it was probably my model or my code that was flagging up the error, I downloaded the StandAlone example from that same guide and copypasted the Python script - but it returned the exact same

Hi. Please, I would like to know if it is possible to create a stochastic model from an existing deterministic Non-linear programming problem using AIMMS. I need great help regarding generating scenarios in a multiperiod Optimization problem containing 3 uncertain parameters.Thank you

I was wondering if there is any way to generate a pool of multiple optimal solutions for a MIP solved using CPLEX?I appreciate any response in advance

Hi, I have been following the Employee Training example. However, I cannot run the code (attached). It is said that the solution does not exist. I don’t know what causes it.Furthermore, how do I check and know if the equations are not feasible ya? I’ve been looking into this Math Inspector, but somehow it’s difficult to understand for me. Thanks,  

Dear all, Few years ago, I used Aimms to create the file as attached. At that time, CPLEX 12.17.1 package was used to solve the MILP supply chain model. However, when I use newer packages (12.8,12.9,20.1) to run the same file, it gives me very different results. Especially, the “CO2_Capture_Compression_Cost” variable is 0 although it should be 5.6 billion euros as I got. I tried many ways to find why it happens but it doesn’t work. Does anyone can help me in this problem? Thanks a lot for your read and help. P/s: please run “ReadCO2sourcedata”, “ReadProductssinkdata”, and “ReadStoragesinkdata” to get initial data from “CO2dat” excel file before running the program.   

Optimization models have a lot of information that needs the user's attention to either review, compare or change. Showing such information on pages usually compels the user to scroll endlessly or scroll up and down when comparing data or switch to and fro between pages. One of the reasons for introducing the Grid Layout was to bring consistency and familiarity within the application. For example, majority of the screen could be used for data widgets, and the left- or right-hand sides can be used for user actions. We also introduced UI components like the Side Panel, Dialog pages, and Status Bar such that common elements could be placed in these components to save real estate on the pages and it becomes easier for the users as well.Even though these components help in many ways, some applications still have a lot more information to show that usually end up in the page having a scroll or where the workflow panel is being used show sub-steps, as illustrated below.  How do you or would y

Dear Community,As explained in the previous article New WebUI Widget Framework!, we are working on POCs and we think its time to show a sneak peek into the progress.Here is a simplified representation of how the new framework would work.First, as we progressed with the specification we realized that JSON’s can be quite lengthy and scary to look at. So we decided to support the specification in XML as well, which is more concise and readable.  Second, we are working on integrating our existing features so that you do not have to change anything in your model. Features like:Custom HTML Tooltips Item Actions Annotations defined in the AnnotationsIdentifier layer or the identifier. Element Texts for Set elementsThird, we are looking at new features that will add value, for eg.In widget Legends that can be toggled On/Off Clearer tooltips X-axis and Y-axis Titles Data labels in/on the chart plots, eg: in the barsHere are some screenshots to get a first hand preview.Chart without LegendChart

Hello,  I would like to change the checkbox background color from blue to other. Which class should I change? Thanks

When scheduling a job as per the API example found here, a job object is returned that also contains a sessionID.Is it possible to store this sessionID in order to later retrieve the status of the scheduled job? i.e. scheduled/running/finished. EDIT:To clarify, this is my problem:Given: a server object and a (valid) sessionID Goal: Create a Job object that I can use to retrieve the Job.Status propertyHow do I achieve this?  As a side question, but not my main focus, how do I get a list of all scheduled jobs (including finished ones) such as the overview you get when navigating to the ‘jobs page’ in the portal?Using the Server.getCurrentJobs() method seems to only retrieve unfinished jobs.

Hi,Is there an pre-defined SAP integration? I am having issues (being approved by the IT for such access) to get SAP ODBC driver. Looking for alternatives, I found that using the SAP integration suite, companies have built APIs to access data from SAP. I wanted to know if AIMMS has such APIs available, or is the ODBC driver the only approach? Thanks

I just created some new colors in the User Colors tool, but once I try to use it on my List Widget icon, it does not recognize.  How can I relate those two things?

Hello, I am working with the AIMMS PRO Cloud Platform and, in one of our systems, the user’s AIMMS project must exchange data with their other solutions through SQLite. We have a current solution in WinUI for this integration but we were looking into adapting the user interface to a cloud-hosted WebUI approach. The challenge we are facing right now is the integration with the DB files. One of those SQLite files reaches the size of 900Mb and the upload widget seems to simply load an animation and show an error. The tool works with smaller files.Would anyone know a way to bypass this size limit while uploading files? Regards, Jean Tremeschin

I tried to draw two lines in a graph for two different parameters, one of them has missing/null values and for some reason AIMMS then draws a line to zero (like in the picture below). How can I fix this? 

Hi AIMMS,Is it possible to add a tooltip to an multiselect widget? For example, below I want to see the description behind the status IDs when hoovering.Adding a tooltip annotation (both to the set as to the binary parameter) does not do the trick for me.