SAP Message XS006 - Recipient & in another SAP system

Diagnosis
Recipient &V1& of type &V2& resides in another SAP system (that is,system &V3&, client &V4&).

System Response
The message was not delivered; A 'no delivery' confirmation may havebeen sent to the sender.

Procedure
The node that delivered this message must be connected directly to theSAP system above (in Release 3.1).