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Common Acess Violation Error

Started by kag1 Jan 9, 2005 at 5:15 PM 2 replies 900+ views

Original Post

Jan 9, 2005 at 5:15 PM

I seem to get this error all the time...Acess Violation reading ____. Im wondering what causes this error to occur. It often is me trying to use a pointer to something before initializing it. Sometimes setting the pointer to NULL before using it works..and sometimes actually doing the


Pointer = new Pointer(var1)

I'm just curious what I can do to make sure I don't get these kindof errors anymore..and what they are caused by..(I think it's using pointer before initializing them...but I don't know for sure) thanks alot

nmi

Jan 9, 2005 at 5:17 PM

When freeing memory, do you set your pointer back to NULL ?

kag1

Author

kag1

Jan 9, 2005 at 5:26 PM

no..i havn't been

nmi

Jan 9, 2005 at 5:38 PM

So you should try replacing

free(p);

by

free(p);
p = NULL;

Same for delete and delete[].

If the access violation then is when accessing address 0 (or close to it), then you probably have used pointers after freeing the memory.

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