Ora-39126 Worker Unexpected Fatal Error In Kupw-worker.prepare-data-imp 71 [work] -

Troubleshooting ORA-39126: Worker Unexpected Fatal Error in KUPW$WORKER.PREPARE_DATA_IMP [71]

Mark sat hunched over his monitor, the blue light reflecting off his glasses. It was 2:00 AM. He was overseeing a massive data migration—the kind of project that makes or breaks a DBA’s reputation. The Data Pump import had been running for six hours. Millions of rows were flowing from the old legacy system into the shiny new 19c container.

Oracle Support or further assistance:

SELECT * FROM dba_datapump_jobs;
SELECT * FROM dba_datapump_errors WHERE job_name = 'YOUR_JOB_NAME';

Workaround: 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.