Error ORA-39064 Might Be Encountered By DataPump Export (EXPDP) When NLS_LANG Is Different From Database Character Set

(Doc ID 1321034.1)

Last updated on MARCH 01, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.
***Checked for relevance on 15-Apr-2013***


In a multi-byte character set environment, if the client variable NLS_LANG is set to a character set which is different from database the character set, then DataPump export may encounter errors like:

ORA-39064: unable to write to the log file
ORA-29285: file write error

The Utilities manual specifies:

"Note: Data Pump Export writes the log file using the database character set. If your client NLS_LANG environment setting sets up a different client character set from the database character set, then it is possible that table names may be different in the log file than they are when displayed on the client output screen."


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