EXPDP - How to Solve "ORA-01466: unable to read data - table definition has changed"

(Doc ID 1902481.1)

Last updated on MAY 16, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.


Export using EXPDP like below is failing for a table with following error.

EXPDP syntax :



The value of SCN supplied to parameter flashback_scn does not correspond to the time of LAST_DDL_TIME from DBA_OBJECTS for the specific table.

A table's DDL may have changed due to a truncate job and LAST_DDL_TIME can end up ahead of the flashback_scn time supplied in the parameter.


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