SAP Message USC592 - The contact &2 was not sent completely, or not sent at all

Diagnosis
Errors occurred while the contact &v2& (&v1&) was being sent. Thecontact was not sent, or was sent incompletely.

System Response
Processing is continued.

Procedure
Look for error messages in the send log of this contact in contactmanagement. After correcting the causes of the error, send this contactmanually from contact management.