Hi i'm using 9.2 under W2K and get this message when i use export utility evene when there is no activity in database.

EXP-00056: ORACLE error 1466 encountered
ORA-01466: unable to read data - table definition has changed
. . exporting table ROUT_EXP 0 rows exported

but i don't understand the oracle error book and also EXP-0056 doesn't exist in alarms list.
thanks for help what should i do to get a complete backup