Optimization Tooling

I am getting this error while uploading my aimmspack file. Could you please let me know what to do to resolve the same?

Hi,when writing to a database, is there a combination of “insert mode” and “dense mode”? I’m looking for something which does not delete the complete database table, but still writes data for rows where all parameters are empty.Benedikt

It seems that for an internal function, I have to specify the arguments with index and size? How can I create an internal function to calculate inverse for any matrix? In this case, do I have to use external function? Thanks.

Hey. I am working to create a tool (GUI) in AIMMS platform. I have multiple pages in Page Manager for developing the tool. In one of the pages, I want to add an ‘Help’ button, clicking which should open the user manual of the tool (in pdf version - not the AIMMS user manual). Is it possible to implement this?Thanks.

I encountered this error when running the model. The model is fine, since it works with another set of input data. But with this particular data set, it gets stuck in the Presolving phase, and returns nothing. After force exciting the model, This is the message that it shows in the .err file. Have the same issue when running on the cloud as well.

I am wondering if it is possible to disable end-user filtering in one specific table in the UI?The use case as follows: the user needs to be able to do mass changes on a specific parameter displayed in the a table. The idea is that by filtering through a few multiselect widgets the user can define which rows are displayed in the table, and then via buttons or widget actions apply the mass changes.To avoid the confusion for the user, I want to restict the user from applying end-user filtering, since this will not work appropriately with the mass change procedures.

Hi, The AIMMS Portal allows developers to grant permissions to the aimms apps at different levels ( environment / Group/ User )In a situation where the permissions were invariably modified, reset or lost.Is it feasible to retrieve permissions to an app from a previous day?  Is it feasible to retrieve history of all permission modifications that have been made to an app?  Is it feasible to retrieve history of all added users ?      

Hello! In the WebUI of AIMMS I created a bar chart containing based on 23 data points. However I would like to order the different bars in an ascending order. Is this possible in the WebUI?  Next to that I have another question: in the same WebUI I have another bar chart which shows the workload of 60 different nurses. Right now each of the nurses gets a specific color, however there are three different types of nurses. So in the bar chart it would be nice if each nurse of a certain type has the same color. So, for example, all nurses from type 1 get a green color in the bar chart. Is this possible in AIMMS? Thanks in advance!  Jelle

Hi AIMMSians,I used to run the GUROBI solver asynchronously a few months ago. But now I am limited to use only one session each time. I use the academic license and the only change is the new academic license delivery, so I guess that is the reason for the new limitation. Can you confirm my guess? if yes, would it be possible to give academics the access for solvingasynchronous sessions in GUROBI and CPLEX?

Hello, Has anyone had success in reading Excel files residing on a Sharepoint? Any pointer or suggestions would be appreciated.Thanks,Scott

Hi, I'm trying to upload a custom image from my desktop as a background image (in WebUI) for a study project. However, I do not know how to do this, as I'm not an experienced programmer. Can someone help me, please?

I currently face the issue that the variable TotalCost needs to be a free scalar variable. The range of the variable is set to free and I don't have specified the index domain anymore. What can be the reason for this error? 

Hi Nice members,Hope you are doing good. I have a question. I have many points and I am constructing a network in AIMMS such that all points are connected to one main source point but not only in direct manner. These points can be directly connected or connected to each other as well to be connect to source point (Such that end point is connected to the points lying in middle of source and end points). My decision variable is binary which tells either any two points are connected or not. Objective is to minimize the cost which actually depends on creating the total shortest connected path which obeys the constraints. I want to know the “xyz” property of any point which actually depends on its connection to the previous node(distance from previous node it is connected to)  plus the “xyz” property of previous node. How can I write it in an equation in AIMMS. I do not know the order in which the connections of nodes are going to be happen because it is the optimization problem. It was a l

I was wondering if the following workflow is possible in AIMMS WebUI.User runs a procedure - this could include a web::request_invoke_async() or Execute(), for example User can continue other work Status bar procedure polls for an update and displays statusCurrently, I could setup a manual polling procedure that the user can click and run to check the status. I imagine one can setup a separate app that gets an ID and details of user request and polls for the status and runs an AIMMS procedure using AIMMS PRO API to update the status bar. (Is it even possible to run a procedure in an active AIMMS session/job through the PRO API?) It is a little too convoluted to setup simple use cases.

I would like to index by number for the code provided below, but I get the warning that numeric values can not be used for indexing. Is it possible in AIMMS to do this? 

I am trying to implement the Rough Cut Capacity Planning for an school assignment. I currently have all constraints working except for the first constraint, since I do not know how I can loop over subset of time which is determined by two parameters release date(rj) and due date (dj). 

Hi AIMMSians, I am using the AMD 3995WX processor which has 128 logical processors. I realized that a single instance of AIMMS only uses 64 logical processors as processors are grouped by windows’ limit (64 cores). To use all 128 processors, I can run two instances of AIMMS at the same time. The first instance gets affinity of group0. Then I need to modify the affinity of the second instance to use the second NUMA (group1). Still, I would like one instance of AIMMS employs all logical processors. I assume the same problem exists on servers where the number of logical cores often exceeds 64. Is there any way to bypass windows' processor group policy (i.e. make AIMMS group aware) and distribute the job between all 128 available threads? Note 1: I tried CPLEX and GUROBI solvers. I am not sure if this limitation is related to AIMMS or the solvers.Note 2: I am aware of disabling Hyperthreading/SMT, but that is not desirable. 

Is it possible to limit the solver session of multi objective optimization for a specific time?

Hi, I know this was asked before (I believe a > 1 year ago), but is there already a way to show the values in a bar-line chart. I know you can have a nice hint-text, but I want these labels shown immediately, so you can get all relevant data in one single view/screenshot (useful for ppt presentations for managers).In addition, the values for the bars and line I want to show have different ranges, thereby having a secondary Y axis is almost a necessity. Is that already possible, or expected anytime soon? My customer now copies data to Excel so they can make the graph they want, which I believe is a pity. Many thanks,Frank

In your answer to my previous question, you mentioned I could keep the questions coming. Last couple of days I have been playing quite a bit with AIMMS and the WebUI again, so here are some of my questions @Pratap Kumble  . In the winUI, I had the option of denoting a string parameter that should be used for the display of the values of an index of a parameter in the pivottable. For example, my set could be elements {0,1,2} but I could set a string parameter to be used to display the values of the set, meaning in the table it would be shown as { “My option 1”, “My option 2”, “My option 3” } Is this still easily possible and am I overlooking something, or is this option not possible anymore? One of the options I liked in the winUI is setting the columns to auto-width based on the data that was displayed. This way I did not have to manually figure out what is the best width for each of the columns. Is this option still possible in the webUI? Do I understand correctly that the difference

Hello everyone, I am new to AIMMS and I think I like it because of its graphical user friendliness. I want to use AIMMS to optimize the charging profile of a number of vehicles in a decentralized way such that the original central problem is decomposed to be solved independently as a subproblem by each vehicle. This is to be done for vehicles 1 to N over a number of time steps. I discovered this is difficult for me because the objective function in AIMMS is usually a scalar. Please, how can I do this? thanks

Good morning and a very good day to you!Dear Sir / Madam,Currently, I am running big data using AIMMS for my Final Year Project to produce an optimal exam timetable. My MIP model consists of 1 decision variable, 3 objective functions and 14 constraints.I encountered the same problem for many times when I was running my data. I realized that AIMMS will usually shut down on its own after running for more than 2 hours before even getting the results. I have checked my computer to see if it has any technical problems but I have not found any. Can you please help me with this problem? I am attaching a relevant picture for your further references. I am looking forward to getting a favorable reply from you soon. Thank you for your time and patience.

hello everyone,i have a question about my aimms project:i have two variables: x(t,k) and y(t,k)now i want to determine, thatif x(t,k) < y(t,k) then y(t,k) = x(t,k)i already know that this is not possible with an if-statement.has anybody an idea? Thanks in advance.Seb 

Hello everyone,i'm just a beginner and have a few problems with aimms. I am investigating a warehouse in which customer orders are split up into partial orders. Each partial order is assigned to a zone.My problem is that Aimms assigns the partial orders to multiple zones instead of just one. In the attachement you can see that a partial order is assigned to several zones. j are the partial orders; z are the zonesIs there a way to say in a constraint that only one value can be assigned? Thank you!!!

Hi, I was using the GeoFindCoordinates function in AIMMS to map a given city name to a lat/lon combination and received an error message all of the time. Then I remembered I was on VPN and maybe there was an issue with the connectivity, so I disabled my VPN connection and tried again and the GeoFindCoordinates was able to execute without a problem.Whenever I am connected to the VPN connection at work, all my outgoing connections must go via a proxy server. Almost all programs I am working use the standard http_proxy and https_proxy environment varaibles, but it looks like GeoFindCoordinates is not doing this.I know there was a possibility to provide proxy settings for activating a license, but I can’t seem to trigger that option (as this seems to use my IE proxy settings).Is there any other way that I can set the proxy settings for this function? Also, could there be a potential for any other functions (like calling webservices, etc) that make outside HTTP(S) connections that they do n