Diagnosis
The Business Add-In (BAdI)
CACS_RET_DBC_CHECK_DATA is not implemented. However an implementationis mandatory for the database conversion of theretention.

System Response
The database conversion will not be carried out. No changes will be madeto the database.

Procedure for System Administration
Implement BAdI CACS_RET_DBC_CHECK_DATA
and restart the database conversion.