Hi all, I noticed a strange behaviour in 1.5.4 which seems to me as a bug. I'm trying to launch 4 ranks on 2 nodes. If I add "-npernode 3 -bynode" parameters mpirun freezes on start. When I tried with the "-display-map" parameter it shows the following: ./mpirun --np 4 --host mir1,mir2 -npernode 3 -display-map -bynode ./hello
======================== JOB MAP ======================== Data for node: mir1 Num procs: 3 Process OMPI jobid: [42759,1] Process rank: 0 Process OMPI jobid: [42759,1] Process rank: 2 Process OMPI jobid: [42759,1] *Process rank: 4* Data for node: mir2 Num procs: 1 Process OMPI jobid: [42759,1] Process rank: 1 Which seems as a problem since there supposed to be no rank #4 as np=4. I've also tried with trunk. The application also freezes but does not show the map of ranks. Could you please assist if this is a bug or I'm doing something improperly? Regards, Andrew Senin