SAP Message XS831 - Message cannot be processed: Invalid version specified (&)

Diagnosis
When calling RFC in this SAP system, the caller specified an invalid orincompatible version number which makes processing this function callseem pointless.

System Response
The RFC call was terminated.

Procedure
Check the version number of the caller (&V1&) against the version numberof this SAP system. Consult the manufacturer of the calling softwareregarding a suitable version.