Error 0xc000005 when run the program

[Deleted_U_Intel]

First at all, excuse me for my bad english. I'm professor at university and i work in quantum chemistry. I use vf for some years, and now i have a problem that i don't know how to solve.

I'm trying to read and write a ini file, and when I try to write the ini file, the program sometimes work bad and give me the error message "Unhandled exception in FINI.exe:0xc000005:Access Violation". When the program crash, i can see this line in the dissasembly window:
0040A61E mov byte ptr [edi],al

I have read a lot of information about this error message but the problem continue. What's the problem?.
I have a pentium IV, 3000 MHz, windows xp sp1.

Thanks.

[Steven_L_Intel1]

See if this article helps you. If you run the program under the debugger, it should stop at the point of error. This may help you find the problem.

[Steven_L_Intel1]

midum is a "dummy argument", that is associated with the argument passed in. If you passed in a constant, you will get an error here. DVF5 did not protect constants and would allow you to overwrite them. That changed in 6.0.