SAP Message W_MD004 - No new tasks could be started due to communication errors

Diagnosis
No (additional) tasks could be started in parallel processing ascommunication errors when reported by the parallel processingenvironment. The errors had the following descriptions:
V2.

System Response
Processing was cancelled in step: &V1&.

Procedure
Depending on the point at which processing was cancelled, you canrepeat processing after solving the problems.

Procedure for System Administration
Identify and solve the communication problem.