Dear Lisandro, I'd be very grateful is you could help us to understand why mpi4py does not work with MPI-1 . We've succeeded to build and run mpi4py with MPI-2 (mpd) only. We did not get thought for MPI-1 case and for MPI-2 (smpd). We are using SGE queuing system and for it we need weather MPI-1 or MPI-2 (smpd) working. What we've got so far plz see attachment where we are sending you 2 configuration files and 3 log files plus info file about python. The only conclusion we've come to is that to get MPI-1 working we need to recompile python. Python we used is the standard installation of OpenSuSE 10.2 . If you need any other information which we've missed to provide plz let us know. Thank you very much in advance for your help. Regards, viktor