mpiexec fails as MPI init aborts

Question

I am trying to install MPICH 2 on a 64-bit machine running on Ubuntu 11.04 (Natty Narwhal). I used

sudo apt-get install mpich2

First I was surp

Answer 1

Indeed, these error messages are all Open MPI errors. For some reason, you appear to also have a (badly configured?) copy of Open MPI installed somewhere. You can check which particular file you are executing when you type mpiexec by running which mpiexec. I believe that you can compare this with the result of:

dpkg --listfiles mpich2

(or similar) in order to figure out where the MPICH2 package was installed.