My application is behaving correctly on node n006, and incorrectly on the lower numbered nodes. The flags in the error message below may give a clue as to why. What is the meaning of the flag values 0x11 and 0x13?
====================== ALLOCATED NODES ====================== n006: flags=0x11 slots=3 max_slots=0 slots_inuse=2 state=UP n005: flags=0x13 slots=3 max_slots=0 slots_inuse=1 state=UP n004: flags=0x13 slots=3 max_slots=0 slots_inuse=1 state=UP n003: flags=0x13 slots=3 max_slots=0 slots_inuse=1 state=UP n002: flags=0x13 slots=3 max_slots=0 slots_inuse=1 state=UP n001: flags=0x13 slots=3 max_slots=0 slots_inuse=1 state=UP I'm using OpenMPI 4.0.3. Thanks, Kurt