PIC16F877a: hardware stack underflow?

[rosecatherine]

i load my program in PIC Simulator IDE (Oshonsoft Software solution).
my pic is 16f877a.
when i start the simulation, it immediately pops a message saying "Hardware Stack Underflow".

when i looked at the hardware stack viewer, it shows like this

level 1: 0220h 0001000100000
'
'
'
'

what to do?

thanks in advance.. i would really appreciate your help!

 

[blueroomelectronics]

Unless you post your code...

 

[yeongwei2008]

hi, i encountered this problem before, and my mistake was calling too many times but did not make return.

Maybe you did the smae mistakes too. =)