[OMPI users] 'orte_ess_base_select failed'

[Russell McQueeney]

I installed OpenMPI 1.3.1, and whenever I or mpirun try to start orted 
on any of the machines, it shows that message, and
--> Returned value Not found (-13) instead of ORTE-SUCCESS
Is there anything obvious that I missed?
My machines are Intel x86-32, running fedora (10 and 2)