Oracle Solution for Error ora-30757

ORA-30757: cannot access type information

What triggered the Error:

Either a subtype was created and operations performed with this new type while the session was in progress, or the type information was unpinned from the object cache.

What should we do to fix it:

Commit necessary changes, end the user session, reconnect again and re-try the object operations. If problem persists, contact your Oracle Support representative.