How to fix the Oracle error ORA-28515: cannot get external object definitions from string?

In this post, you’ll learn more about the Oracle ErrorORA-28515: cannot get external object definitions from string with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-28515: cannot get external object definitions from string

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

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.

How to fix the Error ORA-28515: cannot get external object definitions from string ?

You can fix this error in Oracle by following the below steps

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.