Diagnosis
Each instance definition must contain a server name.
This must be unique in the system.

Procedure
Specify a server name or have the system generate a server name. To geta server name that adheres to the SAP naming convention, perform thefunction "Standard settings". The function "Actual settings" copies allthe data of an active server into the instance description; The servername, under which the server is known to the message server, is copied.