Oracle Database / Operations & Incident Response
ORA-06508: investigate an unavailable PL/SQL program unit
A caller may reference a missing or invalid program unit after deployment or dependency changes. Inspect the named unit and compiler errors.
Environment and inputs: Oracle Database 19c baseline · SQL*Plus-compatible SQL unless RMAN, DGMGRL, ADRCI or a host shell is specified. Check release, patch level, edition and container first.
Start with this diagnostic
Use the stated SQL, RMAN, DGMGRL or host shell and replace sample names with approved targets. DBA and V$ views need authorized catalog access in the correct container. Do not grant broad privileges for an example.
SELECT owner, object_name, object_type, status FROM all_objects WHERE owner = 'APP_OWNER' AND object_name = 'APP_ORDER_API';
SELECT line, position, text FROM all_errors WHERE owner = 'APP_OWNER' AND name = 'APP_ORDER_API' ORDER BY sequence;Read the result
The pair distinguishes visible object state from actual compiler diagnostics. Name resolution and edition context can also affect the call.
Resolve and verify
Repair the deployed dependency or compilation issue and validate the original call in its application session context.
Operational precautions
Do not replace the package with a stub or recompile unrelated code indiscriminately.