@User When I run xschem from console without using -b switch , it runs absolutely fine. I don't know the reason when i run xchem using -b it goes into never ending simulation. I even did not remove any xschemrc file. still it ran fine without -b but not with -b . Still we need to look into this issue.Thanks for all of the efforts and suggestions. But I still request you to kindly have a short meeting as per the schedule which suits you the best. I am writing my email for convenience rpanwar88@gmail.com. Best Regards