ORA-23368
name string cannot be null or the empty string
Cause
Argument "sname1," "sname2," "oname1," "oname2," "missing_rows_sname," "missing_rows_oname1," "missing_rows_oname2" to "differences()" or "rectify()" cannot be NULL or '' (empty string).
Action
Change argument to non-null or non-empty string.