You haven't given us much to go on, Asha. Are you getting error messages? If so, please append those.
In general when you post to this forum, it is always a good idea to give a complete problem description and exact error messages from the CIW or spectre.out logfile.
Sr. Staff Support AE, Global Customer Support
Cadence Design Systems, Inc.
In reply to Tawna:
I figured out what was wrong. i didnt put in the initial condition to the circuit which was causing me trouble.
thank you for the help.