Datafiles in your TTS are in 10.2.0.1 format because your source DB was with parameter compatibility=10.2.0.1. Having your target database running with compatibility 9.2.0.0 won't allow to plugin any datafiles with compatibility level higher than 9.2.0.0. Opposite should be fine I think. 2005/11/3, DBA Deepak <oracle.tutorials@xxxxxxxxx>: > I changed the COMPATIBLE parameter in the in the init.ora file to > 10.2.0.1.0. And it worked fine. But not sure of the reason. -- Best regards, Alex Gorbachev -- //www.freelists.org/webpage/oracle-l