Need help with C++

I am editing a program and am getting an error when I click the "X" to close one of the child windows. The error reads as follows:
Thread stopped
C:\HC11\Code\Hc11\hc11.exe: Fault:
access violation at 0x465feb: write of
address 0x8

When the debug window comes up I see the map file, and other memory windows, but I don't understand how to read them. This error happens when I open the window, select files, and link them (I am editing a development environment), but not when I simply open the window and then close it. I know the error has something to do with writing to memory that doesn't belong to the program, but when I tell the debugger to go to the source of the error, it tells mt that there is no such line.

If any of this makes sence to anyone and they think they can help, or if I haven't given enough info please let me know. I have to get this bug worked out before the end of the weekend.
thanks

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Raven667
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Windows 2000 Professional
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[This message has been edited by Raven667 (edited March 31, 2001).]