Christian Perau

1. Community
2. Programming
3. ValueError using model.addMConstr since gurobipy 11.0.0

Hi Marika, thanks for the quick response! I know this problem actually existed before version 10 of gurobi. I also created a post regarding that a while ago (https://support.gurobi.com/hc/en-us/com...

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• Christian Perau
• February 23, 2024 12:47
• 0 votes

1. Community
2. Systems
3. using cmake -H. -Bbuild fails

Adding option(BUILD_SHARED_LIBS "Build shared libraries" ON) to CMakeLists.txt was missing to write a .dll, by the way. But unfortunately if I load the corresponding .dll with ctypes.cdll.LoadLibra...

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• Christian Perau
• March 17, 2023 14:34
• Edited
• 1 vote

1. Community
2. Systems
3. using cmake -H. -Bbuild fails

Hi Matthias, Thanks for the hint. Apparently instead of writing either a .dll or .so, the cmake build now creates a .lib file. I guess there will be some option on how to choose the file format, I´...

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• Christian Perau
• March 17, 2023 13:03
• Edited
• 0 votes

1. Community
2. Systems
3. using cmake -H. -Bbuild fails

Hi Matthias, thanks for the explanation! I was wondering if it was possible to create a shared object (.so) file instead of the .exe file (or additionally to it) so that the function is callable vi...

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• Christian Perau
• March 17, 2023 09:16
• 0 votes

1. Community
2. Systems
3. using cmake -H. -Bbuild fails

Hi Matthias, thanks! That fixed the problem indeed. After the cmake build, I tried to run the script (script.c): #include "gurobi_c.h"int main(){ return 0;} from the terminal using gcc: gcc ...

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• Christian Perau
• March 16, 2023 14:10
• Edited
• 0 votes

1. Community
2. Systems
3. using cmake -H. -Bbuild fails

Hi Matthias, thanks for the quick response! I could fix the error regarding the mi1_c++.cpp file. The error regarding the variables GUROBI_CXX_DEBUG_LIBRARY and GUROBI_CXX_LIBRARY remains unfortuna...

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• Christian Perau
• March 15, 2023 13:30
• Edited
• 0 votes

1. Community
2. Programming
3. Gurobipy addMConstr() raises GurobiError: Name too long when passing list of names

For anyone wondering: From version 10.0.0 this is implemented and working correctly.

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• Christian Perau
• February 02, 2023 11:15
• 2 votes

1. Community
2. Modeling
3. Reduce memory usage of gurobipy Model

Hi Jaromil, That´s what I expected. I guess that´s another downside of using python. Thank you very much for your explanation!Best regards,Christian

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• Christian Perau
• January 24, 2023 10:07
• 0 votes

1. Community
2. Modeling
3. Reduce memory usage of gurobipy Model

Hi Jaromil,sure! I was working with gurobi 9.5.2. Updating to 10.0 did however only slightly increase the memory usage. Here is an example. It definetly does not make any sense but will show the me...

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• Christian Perau
• January 23, 2023 15:33
• 0 votes

1. Community
2. Feature Requests
3. Feature request: Crossover only if suboptimal

Hi Tobias,I was wondering if you could also post an equivalent formulation for the solution for the python API as I am not too familiar with C.Thank you in advance! Best, Christian

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• Christian Perau
• September 14, 2022 10:04
• 0 votes