Sonja Mars

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3. Using Windows/Linux

Hi Theresa, Can you share some log files or snippets from the log files (I guess the 33 hours log might be a bit long for a post)? This would be helpful to understand a bit better what is going on....

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• Sonja Mars
• June 23, 2021 06:22
• Edited
• 0 votes

1. Community
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3. Using Windows/Linux

What tool are you using? Did you provide a full path to the log file location? It is possible that you have to additionally set something like outputflag.  You say the runtime can depend on the op...

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• Sonja Mars
• June 23, 2021 06:21
• 0 votes

1. Community
2. Other
3. Gurobi Academic license about to expire

This is no problem, you can simply request a new license from our website. No need to uninstall Gurobi. Please also see here: How do I renew my free individual academic or free trial license? Best,...

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• Sonja Mars
• December 14, 2020 06:25
• 0 votes

1. Community
2. Systems
3. new apple M1 CPUs

Hi Joshua, We are definitely looking at the new hardware. As these chips have just been released we also just got the hardware. So far, we don't have a native version of Gurobi for the M1 CPUs and ...

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• Sonja Mars
• November 30, 2020 06:33
• 1 vote

1. Community
2. Algorithms
3. Not that large MILP model took ages to obtain the optimal results

Hi, I would try each of the following parameters on its own first MIPFocus=1Presolve=2Method=2Cuts=1CutPasses=3 to see if there is any improvement in the runtime. I would then probably combine a fe...

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• Sonja Mars
• October 23, 2020 11:55
• 1 vote

1. Community
2. Algorithms
3. Not that large MILP model took ages to obtain the optimal results

Hi, I am sorry, I don't see the issue in the log. It looks very different from the log of the original post. However, this is quite a big model with 3 million variables 0.5 million constraints, and...

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• Sonja Mars
• October 22, 2020 12:11
• 0 votes

1. Community
2. Algorithms
3. Not that large MILP model took ages to obtain the optimal results

Hi Ibrahim, Can you share a log file or parts of a log file that show the important stages of the solving? Thanks,   Sonja

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• Sonja Mars
• October 21, 2020 06:12
• 0 votes

1. Community
2. Programming
3. Variable Values

Hi Mishelle, Please see this article in our Knowledge Base: Why does Gurobi sometimes return non-integral values for integer variables? Best,   Sonja

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• Sonja Mars
• October 20, 2020 05:09
• 0 votes

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2. Systems
3. Is there any gurobi package for anaconda with Python 3.8?

Hi, You are correct, wit Gurobi 9.0.3 we don't provide a conda package for Python 3.8. However, you should still be able to install Gurobi into your Python 3.8 by using the setup.py script that is ...

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• Sonja Mars
• October 12, 2020 08:16
• 0 votes

1. Community
2. Modeling
3. Creating model takes too much time

Hi, These are many for loops that you have and a lot of conditions. Unfortunately, your code is not self-contained so I could not run it to do some tests. However, you should some small improvement...

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• Sonja Mars
• October 08, 2020 07:19
• 0 votes