I got this message when I issued this command:
root@node1:/home/abolap# ompi_info | grep crs
MCA crs: none (MCA v2.0, API v2.0, Component v1.6.3)
The installation looks okay and I have reinstalled but still got the same issue.
When I searched for the solution I found out that this is a bug which Josh has filed (https://svn.open-mpi.org/trac/ompi/ticket/2097) but I cannot see the solution or workaround.
This is the initial post - http://www.digipedia.pl/usenet/thread/11269/6087/#post6031