OpenLB – Open Source Lattice Boltzmann Code › Forums › on OpenLB › Bug Reports › MPI run — pvd file fault › Re: MPI run — pvd file fault April 19, 2017 at 2:57 pm #2600 albert.minkModerator Yes, I agree. In your situation, several processes want to access the same file and then it crashes somehow. So this means you might have a careful look on you MPI. Can you post YOUR Makefile.inc in the OpenLB project?