Thank you for the information. I don't know what ob1 is and possible other choices are. Is there any way for me to check?
Anyhow, I tried a few things but got the same error. Here ia bit more verbose output: shell$ mpirun -n 1 --allow-run-as-root --mca pml_base_verbose 10 --mca mtl_base_verbose 10 --mca osc_base_verbose 10 --mca pml ob1,monitoring --mca pml_monitoring_enable 2 ./check_monitoring [32c7ade48bf4:52151] mca: base: components_register: registering framework pml components [32c7ade48bf4:52151] mca: base: components_register: found loaded component ob1 [32c7ade48bf4:52151] mca: base: components_register: component ob1 register function successful [32c7ade48bf4:52151] mca: base: components_register: found loaded component monitoring [32c7ade48bf4:52151] mca: base: components_register: component monitoring register function successful [32c7ade48bf4:52151] mca: base: components_open: opening pml components [32c7ade48bf4:52151] mca: base: components_open: found loaded component ob1 [32c7ade48bf4:52151] mca: base: components_open: component ob1 open function successful [32c7ade48bf4:52151] mca: base: components_open: found loaded component monitoring [32c7ade48bf4:52151] mca: base: components_open: component monitoring open function successful [32c7ade48bf4:52151] mca: base: components_register: registering framework osc components [32c7ade48bf4:52151] mca: base: components_register: found loaded component pt2pt [32c7ade48bf4:52151] mca: base: components_register: component pt2pt register function successful [32c7ade48bf4:52151] mca: base: components_register: found loaded component monitoring [32c7ade48bf4:52151] mca: base: components_register: component monitoring register function successful [32c7ade48bf4:52151] mca: base: components_register: found loaded component rdma [32c7ade48bf4:52151] mca: base: components_register: component rdma register function successful [32c7ade48bf4:52151] mca: base: components_register: found loaded component sm [32c7ade48bf4:52151] mca: base: components_register: component sm register function successful [32c7ade48bf4:52151] mca: base: components_open: opening osc components [32c7ade48bf4:52151] mca: base: components_open: found loaded component pt2pt [32c7ade48bf4:52151] mca: base: components_open: found loaded component monitoring [32c7ade48bf4:52151] mca: base: components_open: found loaded component rdma [32c7ade48bf4:52151] mca: base: components_open: found loaded component sm [32c7ade48bf4:52151] mca: base: components_open: component sm open function successful [32c7ade48bf4:52151] select: initializing pml component ob1 [32c7ade48bf4:52151] select: init returned priority 20 [32c7ade48bf4:52151] select: initializing pml component monitoring [32c7ade48bf4:52151] select: init returned priority 0 [32c7ade48bf4:52151] selected ob1 best priority 20 [32c7ade48bf4:52151] select: component ob1 selected [32c7ade48bf4:52151] select: component monitoring not selected / finalized [32c7ade48bf4:52151] mca: base: close: component monitoring closed [32c7ade48bf4:52151] mca: base: close: unloading component monitoring [32c7ade48bf4:52151] check:select: PML check not necessary on self [32c7ade48bf4:52151] mca: base: components_register: registering framework mtl components Cannot find monitoring MPI_Tool "pml_monitoring_messages_count" pvar, check that you have enabled the monitoring component.
