Extracting Number of iterations for IPOPT

[Ashlesha Tiple]

Hello everyone,

I am trying to compare few models based on the number of iterations it required to get the optimal solution. How do I extract the number of iterations from the IPOPT solver?

Thank you

[a-jp]

I'd really like to know this too

[Michael Bynum]

There are a couple ways to do this. Unfortunately, neither is trivial. One way to do this would be to parse the log file. You can access the log file by specifying the name of the log file in the call to solve: results = solver.solve(model, logfile='ipopt_output.log'). You can then open this log file and parse it to get the number of iterations. Alternatively, you could use the interface to CyIpopt with a callback to track the number of iterations.

Michael

[Esteban Daniel Gonzalez Iakl]

Hi, have you found a solution for this issue, easier than parsing the log file? Im looking into this too.