Quote Originally Posted by rshivagami
C:\Documents and Settings>set oracle_sid = orcl

C:\Documents and Settings>exp

Message 206 not found; No message file for product=RDBMS, facility=EXP: Release
9.2.0.1.0 - Production on Tue Jul 31 14:20:35 2007

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Still no improvement.
Yes, You have not set the sid properly, can you echo oracle_sid

set oracle_sid=orcl (remove spaces before and after =)
echo %oracle_sid%