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• Parallel MPI jobs can require 2 "bkill" commands issued within 5 seconds
• If a job doesn't respond to the above, execute "bjobs -w" and find the name of the first node in the list.  Then execute "ssh <nodename> pkill --signal 9 -u <yourUserName>".  You may have to type your password.  This will kill all your processes on the head node (typically bkill will take care of processes on any MPI slave nodes)..
• If the above doesn't work do "bkill -r <jobid>" where "jobid" can be seen with the "bjobs" command.  But use this only as a last resort, since it will leave old processes running on the batch nodes.

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