Re: Strange access violations

From: L D Blake (not_at_any.adr)
Date: 09/30/04 

Date: Thu, 30 Sep 2004 10:41:08 -0400

On Thu, 30 Sep 2004 10:34:54 -0400, Jud McCranie
<youknowwhat.mccranie@adelphia.net> wrote:

>On Thu, 30 Sep 2004 08:13:18 -0400, L D Blake <not@any.adr> wrote:
>
>>Nope... not an exact error message. There will be an Exception Code... a
>>number, usually in the range of C0000000 to C00FFFFF. This tells you exactly
>>which kind of Access Violation took place...
>
>It didn't usually give that, just what I listed. Once in a while he
>then got an "invalid pointer", but I think that's all.

Ok... invalid pointers usually come from only a limited number of sources...

1) Accessing Memory that's been freed.
2) Accessing Memory before it's acquired.
3) Writing to 0 length dynamic arrays.
4) Using uninitialized pointers.
etc.

>>Anyway, as I explained before you probably should run this and other addresses
>>through Delphi's "find error" dialog. Finding out which subroutines are
>>messing you up is the first step in sorting out the problem.
>
>I did that on the three addresses it has given, and I did try
>eliminating the leading zeros, one at the time.

Once again ... 00401BA2 would become... 01BA2 you have to eliminate
everything up to and including the 4. This is because "find error" works on
an offset from the beginning of the file, not the memory address of the file.

-----
Laura

(http://www.start.ca/users/ldblake)

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