I've got the message:
bash: orted: command not found
A daemon (pid 1550) died unexpectedly with status 127 while attempting to launch so we are aborting
when I tried to run OpenFOAM in parallel on 2x Ubuntu 9.10 x64 Server nodes the same way as it runs OK on 2x OpenSUSE 11.1 x64 nodes.
Another time I tried to run it from OpenSUSE 11.1 x64 node on that node and Ubuntu 9.10 x64 Desktop node resulting in the same error message.
OpenFOAM runs OK on 4 cores at one Ubuntu 9.10 x64 Server in parallel under openmpi-1.3.3.