Message SAP XS638 - Currently no delivery to &, due to problems with system resources

Diagnosis
The message could not be delivered to recipient &V1&. An error (such asthe hard drive being full) has occurred in the processing of thecommunication system.

System Response
Processing was completed normally.
Additional information of the used node (if available, in the systemlanguage of the node):
V4

Procedure
Attempt to resend the message at a later time.