The most common scenario for this error is migrating data between different Oracle versions (e.g., 11g to 19c) or between different operating systems (e.g., Windows to Linux). The metadata prepared in the source environment might not be compatible with the target's internal processing rules. 2. Including System Schemas
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PREPALE_DATA_IMP [71] ORA-01403: no data found
Sometimes the error is caused by a specific table. To find out which one, increase the logging detail: TRACE=480300 Use code with caution. The most common scenario for this error is
Refreshing the database's internal statistics often resolves these internal worker errors.
If the error persists and is linked to specific objects, you can bypass the failure by excluding statistics or problematic schemas. Add EXCLUDE=STATISTICS to your impdp command. If the error persists and is linked to
Try performing the import without REMAP_TABLESPACE into a staging area, or check Oracle Support (MOS) for patch 27634993 . Summary Checklist Quick Fix: Add EXCLUDE=STATISTICS to your command. Cleanup: Ensure utlrp.sql has been run.
You will likely see an underlying ORA-XXXXX . Common examples: The most common scenario for this error is
Run impdp with LOGFILE and TRACE to see preceding errors: