ORA-28515

Error: ORA-28515: cannot get external object definitions from string

Causa: Oracle was unable to retrieve definitions of distributed external procedures or remote libraries registered for the non-Oracle system instance, probably because the underlying data dictionary table does not exist or is malformed.

Acción: Verify that the Oracle server's Heterogeneous Services data dictionary was installed correctly. If the Heterogeneous Services data dictionary is not installed, execute the CATHS.SQL script in the $ORACLE_HOME/rdbms/admin directory.