Maui puts my job into batch hold and nothing happens. I am getting errors in running mpi scripts. Refer LRM documentation for further details. Similar to shownode .
Tasks is the number of processors requested.
Please check the Log and Error files for clue of errors. Another possible reason is LRM tried to allocate a node that can't be reached, please check the JobLog. Optimal TaskPerNode is determined by LRM if not specified explicitly. If the adequate number of processors are not available, Maui will put the job into deferred state. These states can be observed under Non-Queued Jobs in the output of the showq command.