Log File in Gurobi 9?

Answered

Ahmad B

December 05, 2019 16:12

Just updated to Gurobi 9. Was the log file output disabled by default in Gurobi 9?

If so, is there a way to permanently change the parameter responsible to always output a log file by default, as in Gurobi 8?

Thanks!

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6 comments

Official comment
Simranjit Kaur

Gurobi Staff

December 06, 2024 00:51
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Gwyneth Butera

Gurobi Staff

December 05, 2019 16:23
Hi Ahmad -

Yes, for v9.0 there is a change in the default for creating the logfile; the default log file only exits for gurobi_cl and the interactive shell with v9.0. Otherwise, you need to set the LogFile parameter.

Gwyneth
0
Ahmad B

December 05, 2019 16:33
Thanks for the quick reply.

For someone who is used to having the log file outputting by default, setting the parameter each time I run a model is quite cumbersome. Is there a way to change the default value to avoid having to do this every time?
0
Vincent

April 22, 2020 23:23
Hi,

I am setting the LogFile parameter manually but the file is almost empty! The only part copied to my logfile is this:
```
Gurobi 9.0.1 (win64) logging started 04/22/20 14:49:32

Changed value of parameter LogFile to gurobi.log
Prev: Default: 
Parameter OutputFlag unchanged
Value: 1 Min: 0 Max: 1 Default: 1
Discarded solution information
```
Would you please tell me what I am doing wrong or what's the correct way to set the LogFile parameter?

Thanks.

Ahmad B Gwyneth Butera
0
Danial Ramin

September 30, 2020 16:16
Hi Vincent,

Make sure to put it before the "optimize" method.
1
Vincent

September 30, 2020 16:57
That was actually the issue!

Thank you Danial Ramin.
0

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Log File in Gurobi 9?

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