Different behavior of Popen with and without pyoptsparse. about pyoptsparse HOT 4 CLOSED

Hi Marco,

Thanks for your swift response. I made some checks and indeed the issue was with mpi.

Unfortunately the option PYOPTSPARSE_REQUIRE_MPI=NO did not work for me. I have no clue why. However, I explicitly installed mpi4py and now pyoptsparse works with Popen, though it shows a small waning.

I can use Pyoptsparse now and can continue with my optimization.

Thanks again for your help.

Cheers,
Nitish

from pyoptsparse.

Definitely, that is the least I can do for your help.

UserWarning: mpi4py could not be imported. mpi4py is required to use the parallel gradient analysis and parallel objective analysis for non-gradient based optimizers. Continuing using a dummy MPI module from pyOptSparse.

from pyoptsparse.

Hi Nitish,
I suspect you might be encountering something similar to what has been discussed here. One of the dependencies imports mpi4py and that might be causing issues in your environment. Do you experience this issue any time you use Popen or specifically when you call mpirun?

from pyoptsparse.

Good to know you found a workaround @NAnand-TUD! Do you mind sharing the warning here for future reference?

from pyoptsparse.