Runtime error R6025

[obai]

Hello,
I am trying to run my c++ programm and I get the following error in debug mode
R6025 Pure virtual function call
and in release mode it interrupts the running and go out.
How could I know where the error exactly. I am using a simulator and I do not know where are the virtual functions exactly

[kbw]

This is caused by a memory overwrite in you program.

[obai]

how could I solve it

[kbw]

http://support.microsoft.com/kb/125749