[OMPI users] prterun: symbol lookup error: /usr/lib/libprrte.so.3: undefined symbol: PMIx_Session_control

[Kook Jin Noh via users]

[vorlket@server openmpi-ucx]$ mpirun -host server:2,midiserver:2 -np 4 
/home/vorlket/sharedfolder/mpi-prime
prterun: symbol lookup error: /usr/lib/libprrte.so.3: undefined symbol: 
PMIx_Session_control

What's going on?