Axel Bruck

Thanks a lot for your help Jaromil!I figured out the problem. I accidentally introduced some negative demand values in the model as an input that however couldn't be supplied since I don't allow ne...

Hi Jaromil,   thanks for your quick answer! But looking at the coefficient statistics I would not assume any numerical issues. And if it becomes infeasible it literally takes a couple of seconds to...

Regarding the code, this is the part that makes the issues: It is a heat pump that can run either in cooling or heating mode but not at the same time both. So I need binary variable(s). If I say th...

Hi Jaromil, I couldn't try the MPS version yet, sorry.  The problem occurs for some inputs and for some not. But it is always the same inputs where it occurs. So yes it is reproducible. I have the ...

Thanks Jaromil, I am always tracking my memory simultaneously. It is at around 85-95% most of the time until it hits the root simplex log where I have the feeling of getting stuck. Then it slowly d...

I ran out of memory when trying the DegenMove == 0. Maybe in the end this is the problem but I do not understand why... and also why I do not get a memory error. Before I had two quadratic constrai...

Another thing that is quite weird: This is another example but why does it do iteration 965072 twice? It should be done after the first time as far as I understand. Same happened in the example ab...

Thanks Jaromil, Yes I can imagine that it is hardly to tell just from the log file ;) It is not the numeric issue. I resolved them (it was a huge big M number).  I will try the suggestion with the ...

I am working on this right now thanks. It is definitely not a memory issue. Do you have any idea what could cause this. I find it weird as according to the gurobi documentation the fact that Primal...

Hi Jaromil,   Thanks for the answer. Unfortunately, I cannot because it is more than 1000 lines of code and depending on input files. Also, for some certain input scenarios it works. Can it be due ...