Ora-39126 Worker Unexpected Fatal Error In Kupw-worker.prepare-data-imp 71 Free Jun 2026

impdp user/password directory=DATA_PUMP_DIR dumpfile=your.dmp logfile=debug.log \ include=TABLE_DATA \ transform=segment_attributes:n

: One of the most common triggers for ORA-39126 during the preparation or metadata loading phase is stale dictionary or fixed object statistics.

This error typically halts an import job, often leaving behind a log file with minimal actionable clues. This comprehensive guide breaks down the anatomy of this error, explores its root causes, and provides a multi-level, step-by-step roadmap for diagnosing and resolving the issue.

This error indicates that an unexpected exception occurred within the Data Pump worker process ( KUPW\$WORKER ) while preparing data for import (code 71 ). This article will break down the causes, provide actionable debugging steps, and outline solutions to get your import running again. 1. What is the ORA-39126 Error? impdp user/password directory=DATA_PUMP_DIR dumpfile=your

To troubleshoot the ORA-39126 error, it's essential to understand the underlying causes. Some common causes include:

This specific error is frequently linked to metadata inconsistencies or environment-specific bugs:

Prevention is far more efficient than cure. To minimize the risk of ORA-39126: This error indicates that an unexpected exception occurred

Internal corruption or inconsistency in a table, index, or other object can cause the Data Pump worker to crash when it attempts to read or process it. This can happen if an object's dictionary metadata doesn't match its physical structure or if an object is left in a partially created/dropped state.

ORA-39126 is a Data Pump error that occurs when there is an issue with the worker process. Here's a breakdown of the error:

impdp ... FULL=Y SQLFILE=check.sql

often points to an issue during the initialization phase where the worker is preparing for data import. Oracle Communities Potential Causes Corrupted Data Pump Metadata

ORA-01403: no data found (Indicates a missing internal dictionary mapping).