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

ORA-39126 Worker Unexpected Fatal Error in KUPW-Worker.Prepare-Data-Imp 71: Causes, Solutions, and Troubleshooting Steps

This error indicates that a worker process encountered an unexpected fatal error while preparing data for import. The error can occur due to various reasons, including: ORA-39126 Worker Unexpected Fatal Error in KUPW-Worker

Understanding the ORA-39126 Error

Preventive Best Practices

To avoid this error in the future:

Narrow the Import ScopeIf migrating between different OS types or major versions (e.g., 11g Windows to 12c Linux), avoid importing all schemas at once. Explicitly include only your application schemas and exclude system schemas: EXCLUDE=SCHEMA:"IN ('SYSMAN', 'XDB', 'WMSYS')". 11g Windows to 12c Linux)

For more specific guidance, you can check the Oracle Community Discussion or consult Oracle Support Doc ID 1508068.1 on My Oracle Support. 'WMSYS')" . For more specific guidance