[SCIP] Help with setting up parallel solve in pyscipopt

[Hon Fai Vuong]

 Hi Ambrose, thanks for your response.  I missed that detail and made the change.  I uninstalled the conda version of pyscipopt since it came with it's own version of scip.  I reinstalled pyscipopt via pip and it now appears that pyscipopt is using the version of scip that I build from src. It runs normally with the optimize() function.  
However when I try with the concurrentopt, it segfaults and produces a core file.  I'm not sure what to do next.  
-Hon Fai

    On Wednesday, April 12, 2023 at 05:39:55 AM PDT, Ambros Gleixner <gleixner at zib.de> wrote:  
 
 Hi Hon Fai,

Did you see the description at

    https://github.com/scipopt/PySCIPOpt/blob/master/INSTALL.md

?  You may have to set `export SCIPOPTDIR=<path_to_install_dir>` in your 
shell.

Best,
Ambros

Am 11.04.2023 um 21:08 schrieb Hon Fai Vuong:
> Hello All,
>      I'm new to SCIP and wanted to try running with concurrent opt 
> mode.  I'm working on Linux and was able to install the scip package via 
> cond-forge, but when I attempted to use the parallel functionality via 
> solveConcurrent(),
> 
> I received the following warning:
> 
> *UserWarning('SCIP was compiled without task processing interface. 
> Parallel solve not possible - using optimize() instead of 
> solveConcurrent()')*
> 
> I read that by default SCIP isn't compiled with the TPI option, so went 
> through the process of building it after much fumbling around.
> I can solve problems via command line with parallel mode with the 
> rebuilt version.
> 
> My question now is how to I tell psyscipopt to use that version?  I 
> naively created a symlink to point the version of scipt in my virtual 
> environment to the rebuilt version, but still running into the same problem.
> 
> Any help would be appreciated.
> 
> Thanks,
> Hon Fai
> 
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