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ORA-26097 During Datapump Import when going from back to (Doc ID 1465339.1)

Last updated on OCTOBER 22, 2019

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 11.2]
Information in this document applies to any platform.


1. A database upgraded from to successfully. Meantime DST timezone also changed from 11 to 14 after the upgrade.
2. We wanted to downgrade the upgraded database back to So we decided to go with datapump export/import option and took the export using the expdp utility of version.
3. Export was a full database export.
4. Deleted the current database completely.
5. Restored the database using cold backup.
6. Dropped the main schema <SCHEMA> on the database.
7. Using the export dump file taken from, imported to database for the dropped <SCHEMA>.
8. Import was going perfectly all tables were imported except one table "<TABLE>" on the schema.

During the import of this table got errors:

ORA-31693: Table data object "<SCHEMA>"."<TABLE>" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-26097: unsupported conversion for column SYS_NC0000400005$ (from type 58 to type 23)
During the import everything went fine except one table:

The <TABLE> involved was a nested table. 




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