I believe that the fix in 3.11.7-2 does not fix the problem, as I can reproduce it when using 3.11.7-2.
When I try to optimize a problem, I am seeing: *** The MPI_Comm_f2c() function was called before MPI_INIT was invoked. *** This is disallowed by the MPI standard. *** Your MPI job will now abort. [cowabunga:23219] Local abort before MPI_INIT completed successfully; not able to aggregate error messages, and not able to guarantee that all other processes were killed! I definitely use 3.11.7-2: ~$ apt-cache show coinor-libipopt-dev | grep Version Version: 3.11.7-2
