Due to previous sins, we have a number of files without viewables and so started a job to recreate virtually all of them. The problem is that it's prone to failing.
At times, it runs fine and then everything will start failing and the job logs indicate "Error, did not find available worker of type PROE". When this happens, nothing will get through. Then, after pulling my hair out for a day or so, it'll start running jobs again (from time to time I resubmit a couple to see if anything's changed).
If I go to the Worker Agent Administration window, it indicates "Fails to Start" for the PROE worker. I had luck one time just clicking on the green flag to start the job, but that only worked once. These jobs all run in PublisherQueueL. "Standard" jobs from check-ins, promotion requests, etc come through fine in either the L or the M queue while these resubmitted jobs are failing.
What would cause the PROE worker to work only when it wants to (and how do I convince it to)?
Windchill 10.2, M030.