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

Understanding and Resolving ORA-39126: A Critical Hurdle in Oracle Data Pump Imports

Step 7: Increase PGA and Worker Resources

Step 3: Retry Without Direct Path

Narrow the Import Scope

If 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')" .

, it typically points to a failure during the initialization phase of a Data Pump Import ( The Anatomy of the Error

Best Practices to Avoid the ORA-39126 Error