I found another failure mode for non-embedded libltdl. On a system with libltdl.so on the login node but NOT the compute nodes I encountered the following, once per rank, at job launch:
/home/phhargrove/OMPI/openmpi-libltdl-linux-x86_64 psm/INST/bin/orted: error while loading shared libraries: libltdl.so.3: cannot open shared object file: No such file or directory The mpirun command hung as a result. -Paul -- Paul H. Hargrove phhargr...@lbl.gov Computer Languages & Systems Software (CLaSS) Group Computer Science Department Tel: +1-510-495-2352 Lawrence Berkeley National Laboratory Fax: +1-510-486-6900