Ronald van der Velden

Hi Julia, If the problem is a minimization problem and all you do between iterations is adding a column, this should not happen indeed, since the optimal solution from the previous iteration is sti...

Hi Sompol, Actually I believe the problem is not in your own code, but in Pyomo. It looks like this version of Pyomo calls a Gurobi function that has been removed in version 12. However, I don't se...

Hi Shesha, Then it comes down to debugging. Your next step would be to find the (i,j) and (k,l) pair that overlap and then request/print the corresponding variable values including the AUX variable...

Hi Shesha, There's two things at play here: Indicator constraints work the other way around. The rule is if AUX=0 then ; the variable in the first argument is the condition, not the "result". The ...

Hi, I would make slight changes to reduce this to a single auxiliary variable: if i != k and j != l:     varname = "AUX_%02d_%02d" % (k, l)     aux = opt_mod.addVar(name=varname, vtype = gp.GRB.BIN...

Hi Shesha, Regarding the strict inequalities: If the X/Y variables are continuous, > and >= would mean the same thing If they are integer, then most likely >= is still what you need. For example, ...

Hi, I would take a different interpretation of the binary variables. When you set variable A(x,y)=1 then you would mean that the top-left corner of a plate A, is placed at (x,y). In your example, l...

Hi, I believe you cannot split the problem in these two steps. While the plates selected in image 2 might be sufficient in theory (e.g. the sum of the areas matches the wall), but there is no guara...

Hi Harsh, Thanks a lot for the additional background info! Most likely, the reason is the following. Gurobi v11 supports univariate non-linear expressions. Trees of expressions (e.g. z = sin(y + ex...

Hi Harsh, Thanks for posting here! Where exactly does this error occur, can you share a code snippet? It seems to be on the JuMP side so I'm wondering if the error is Gurobi-related or not. Kind re...