ORA-28507

Error: ORA-28507: error in data dictionary view string

Causa: The initialization parameter table for the Heterogeneous Services was not available, or its structure (number of columns or column types) was incorrect.

Acción: Verify correct installation of the following Heterogeneous Services' initialization parameter views: HS_CLASS_INIT and HS_INST_INIT. If these views are not available, make sure you ran the script CATHS.SQL in the $ORACLE_HOME/rdbms/admin directory.