import petsc4py on a cluster

[martinpauthenet]

I am working on a supercomputer made of nodes that each have 20 cores. when using e.g. 40 cores on 2 nodes, the program gets stuck at the 'import petsc4py' line. when using 20 cores 1 node, the program perfectly runs.

[Lisandro Dalcin]

Ask for help to the support staff. With such a little information, I cannot even guess what's going on. As petsc4py seems to be working on a single node, it seems that the problem is not really in petsc4py. Did you try to run some simple pure-C PETSc example? What MPI implementation are you using?

[martinpauthenet]

Dear Lisandro, thank you for you answer. My problem was related to the way I ran my scipt on several nodes. So it is not a petsc4py related issue. The staff helped me overcome the issue.

Thanks again,

Martin