Hi,
For the issue you can consider SAP KBA 1856928 - ST22 dump appear CALL_FUNCTION_NOT_FOUND - SAPLE2 _CCDB_FUNC - Function module "/SSF/CALL_SUBROUTINE_RFC" not found with Solution Manager
and follow
Cause
- Function module "/SSF/CALL_SUBROUTINE_RFC" belongs to package "/SSF/" which is part of ST-A/PI component
- ST-A/PI is missing on managed system
- For instance, ST-A/PI may be missing following an upgrade of the managed system
Hope this will help you.
Regards,