Hi all, I have got one problem. I am running a script in which my first statement is " SET TRANSACTION USE ROLLBACK SEGMENT RBS01;" but the script is throwing error as " ora-01555 (See ora-01555.ora-code.com): snapshot too old. Rollback segment rbs02 too small" . Now the problem is why its throwing error on RBS02 when I have set my transaction to use RBS01? Any comments on this or any suggestion ?