SAP Message BT604 - Failed to receive external program protocol

Diagnosis
When the external program sent a status message to the SAP system, itreported that log messages are pending for transport. When the systemattempted to receive these messages, it determined that thecommunications link had already been terminated before the log couldbe sent.

System Response
Because the connection has already been terminated, there is no way toreceive the log. As a result, the system cancelled the receivesequence by triggering an exception.

Procedure
The status message was received. This status can be evaluated insubsequent processing. Whether the fact that the log is missing hasserious consequences or not depends on the application.
In any case, you can search the system log for the cause of thisproblem. In particular, look for any messages regarding CPI-Cproblems.