That's a bug in 10g: Bug No. 5211477 SEQUENCE STARTS WITH WRONG VALUE AFTER EXPDP/IMPDP Unfortunately it is not fixed in any 10g realase. See my info about the bug ( in Polish ) http://dba.pl/blog/2008/03/20/oralce-data-pump-expdp-impdp-i-sequence/ Grzegorz