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

ALTER TABLE problematic_table DISABLE ALL TRIGGERS; ALTER TABLE problematic_table MODIFY lob_column (lob_storage AS basicfile);

Outdated statistics on internal dictionary tables or fixed objects can cause Data Pump to fail during its preparation queries. Invalid Objects: Dependent objects like SYS.KUPW$WORKER SYS.DBMS_METADATA might be invalid. Empty Temporary Tablespace:

impdp ... SQLFILE=create_tables.sql

: Ensure the default temporary tablespace is correctly assigned and has active tempfiles.

Then import that table separately with additional diagnostic parameters: ALTER TABLE problematic_table DISABLE ALL TRIGGERS

The schema being imported contains invalid spatial indexes, functional indexes, or complex constraints that fail during the "prepare" phase.

Refreshing the dictionary and fixed object statistics often clears internal metadata mismatches: EXEC DBMS_STATS.GATHER_DICTIONARY_STATS; EXEC DBMS_STATS.GATHER_FIXED_OBJECTS_STATS; ALTER TABLE problematic_table DISABLE ALL TRIGGERS

ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PREPARE_DATA_IMP [71]