Dear all, I want to use MPICH instead of OpenMPI and have some difficulties. Using OpenMPI worked fine. I run my program on two different machines and set the MPICH_PORT_RANGE to that of OpenMPI, but it seems like my program is running into a deadlock. Sometimes I do not get any error message and sometimes I get the following: Assertion failed in file src/mpid/ch3/src/ch3u_handle_connection.c at line 325: vc->state == MPIDI_VC_STATE_ACTIVE internal ABORT - process 0 Do I need to change the port range of MPICH? Is there a function like ompi_info to figure out the port range for MPICH as well? Or do you think there is another problem? Do I need to set other environment variables as well? The ssh connection on both machines works. I also used a test program using only send and receive calls which led to the same problem. I would be very happy for any hints. Thank you and have a good weekend! Lisa _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss