For most of the cases back to user mode(alt+f9) works but in some cases it does not work.Could anyone please explain why it is so and how to get around this problem.

lol

I think you'll need to provide a duplicatable instance of where Alt-F9 doesn't work. Then you'll have something to debug.

Alternatively, use Ctrl-F9 (execute till return) to step out of system code until you get back to the program code. Or, as blabberer once pointed out, use the minus (-) key to step backwards until you get back to where you stepped into system code, then set a breakpoint ahead of that.

Thanks Kayaker. Ctrl-F9 is working, but I did not understand this "duplicatable instance" concept. What do you mean by "provide a duplicatable instance"

I meant, do you have a real example of where alt-f9 always doesn't work? Such that anyone else can test and get the same result.

Ok. Ctrl-F9 is working fine. Thanks a lot