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Error:Connecting ... failed : Invalid exchange - Protocol driver not attached

The following error messages during batch job execution may hint to an out-of-memory condition:

Error:Connecting to (rank 1476 to 4058) failed : Invalid exchange
Error:Connecting to (rank 1940 to 4520) failed : Protocol driver not attached

The given IP addresses, port and rank numbers may vary from case to case.
In order to solve the problem, try one of the solutions given in chapter Memory Optimisation: