Changing the linear solver from mumps to MA57

Alessandro Zavoli

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Aug 1, 2017, 8:27:13 AM8/1/17

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I managed to install PSOPT on Ubutnu 16.04, but i cannot find a way to use any linear solver other than mumps
i had an academic licence form HSL software.
i downloaded the source files and copied them into the ipopt/thirdParties directory

Now, how can I select which linear solver to use?

Victor M. Becerra

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Aug 1, 2017, 9:37:18 AM8/1/17

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Alessandro

I think you need to leave just the source for ma57 under the 'Third Parties/HSL' folder, and then do a clean recompilation and installation of Ipopt. The commands for compiling Ipopt can be found in the script that installs PSOPT (lines 13-16). I suggest you take a look at the Ipopt installation instructions. As ma57 is in fortran you will need to have g77 installed as well.

Regards

Victor Becerra

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Alessandro Zavoli

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Aug 1, 2017, 9:55:49 AM8/1/17

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thank you for your answer!
It seems that the installation is fine. It now automatically detect ma27 instead of mumps.
However, i have no clue how to select the linear solver (e.g., forcing ma57 or mumps or another one)

Ipopt installation instructions are not clear in that regards.

Alessandro

Victor M. Becerra

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Aug 1, 2017, 9:58:30 AM8/1/17

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Alessandro

You just need to install the linear solver that you want to use, you do not need to install more than one solver.