Error Message :
R3_MODIFY_VARIANT
...........
Error 'JCO_ERROR_SYSTEM_FAILURE' in 'BAPI_XBP_VARIANT_CHANGE' call.
Datenobjekte in Unicode-Pro
It is impossible to use the R3_MODIFY_VARIANT function in a SAP job to modify a variant value.
BAPI_XBP_VARIANT_CHANGE does not take the provided parameters, and messages similar to these are displayed. 2016-06-27 15:01:16 - U2004081 Error in function 'BAPI_XBP_VARIANT_CHANGE': 'Invalid Parameter (function BAPI_XBP_VARIANT_CHANGE)', type: 'E', id: 'XM', number '033'
2016-06-27 15:01:16 Invalid parameters (function BAPI_XBP_VARIANT_CHANGE)
These issues can be encounterd in SAP Basis 7.00 through 7.50.