Last updated on APRIL 10, 2017
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 9.2 to 12.1]
Information in this document applies to any platform.
**Checked for relevance on 04-Feb-2016**
After upgrade, errors such as the one below occur intermittently:
ORA-06508: PL/SQL: could not find program unit being called:
The procedure name can be a dictionary object (DBMS_OUTPUT, DBMS_UTILITY are common examples) or a user created object.
Another possible symptom is the sudden object invalidation without an obvious cause.
DBA_REGISTRY shows all components as being valid.
The issue is not reproducible because of the intermittent nature of the error.
Known scenarios when such situations have occurred:
- Database upgrade.
- Privileges that were revoked and subsequently granted back, e.g.
when revoking privileges from public and granting them to specific users
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