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Access violation in C++ Borland Builder

5 New Member
I am working with Borland C++ builder and got this error message:

Debugger Exception Notification

Project Project1.exe raised exception class EAccessViolatio n with message 'access violation at address 00404F6A in module 'Project.exe'. Read of address 00000022'. Process stopped. Use Step or Run to continue.

What does it mean and how can I get rid of it?
Sep 4 '06 #1
2 12139
9,065 Recognized Expert Moderator Expert
I don't know, but most of this type of problem are cause by either trying to dereference a pointer that does not have a good value or by accessing an array index in an array that is larger than the array was defined with.



int array[5];
char *p = (char *)2; // Assuming 2 is an invalid pointer value

*p = 7; // Possible exception invalid deference of a pointer

array[5] = 6; // Out of bounds array access, possible exception
Sep 4 '06 #2
5 New Member
I believe it`s not that. To give you a better view what`s going on I`ll explain when it occurs:
My program uses shortest path algorithm, for example it seeks for a shortest way between 2 cities. When cities are close to each other, it works fine. But when I enter cities with a bigger distance between them, this error occurs. In my opinion program cannot allocate enough memory for more complicated operation. I`m a very beginner of C++, that`s why I`m not sure if I am right. Is there any way I could fix it?
Sep 5 '06 #3

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