D7 PRO DBISAM - V4 latest, all builds

As more of my client base moves to WIN XP, I am getting more and more issues
where my software is causing  "access violation at address 000000" type
errors. Although a windows error, this doesn't occur with any of their other
software so of course they look at mine instead. Anything I should be aware
of... sharing issues, etc.. I have already made the changes to the file
extensions to get around the Norton issue.

Thanks for any and all help. Sean

All I can say is it works here fine, so you should use something like
madExcept to find out the real cause.

/Matthew Jones/

It may be because you are logged on with admin rights. I will check the
threads here as I know it has been brought up before. Thanks, Sean


"Matthew Jones" <matthew@matthewdelme-jones.delme.com> wrote in message
news:memo.20060316162010.3784B@nothanks.nothanks.co.uk...
> All I can say is it works here fine, so you should use something like
> madExcept to find out the real cause.
>
> /Matthew Jones/

Sean McDermott wrote:

> D7 PRO DBISAM - V4 latest, all builds
>
> As more of my client base moves to WIN XP, I am getting more and more
> issues where my software is causing  "access violation at address
> 000000" type errors. Although a windows error, this doesn't occur
> with any of their other software so of course they look at mine
> instead. Anything I should be aware of... sharing issues, etc.. I
> have already made the changes to the file extensions to get around
> the Norton issue.
>
> Thanks for any and all help. Sean

Sean,

Are you using threads? Is this a limited account? Looks like a nil
pointer. I'll second MadExcept. It would greatly narrow the issue down.

-AJ Marknette

It only happens on some client machines and very rarely. Can't pinpoint any
particular action or sequence of steps. Only commonality is Win XP which is
becoming so common that it may be unrelated.  I assume Mad Except (not
familiar) has to see the exception to be of any help?

"AJ Marknette" <aj@SPAMNOmarknette.com> wrote in message
news:323EF758-9F8A-4F11-8110-EDE706937868@news.elevatesoft.com...
> Sean McDermott wrote:
>
>> D7 PRO DBISAM - V4 latest, all builds
>>
>> As more of my client base moves to WIN XP, I am getting more and more
>> issues where my software is causing  "access violation at address
>> 000000" type errors. Although a windows error, this doesn't occur
>> with any of their other software so of course they look at mine
>> instead. Anything I should be aware of... sharing issues, etc.. I
>> have already made the changes to the file extensions to get around
>> the Norton issue.
>>
>> Thanks for any and all help. Sean
>
> Sean,
>
> Are you using threads? Is this a limited account? Looks like a nil
> pointer. I'll second MadExcept. It would greatly narrow the issue down.
>
> -AJ Marknette
>
>

Sean McDermott wrote:

> It only happens on some client machines and very rarely. Can't
> pinpoint any particular action or sequence of steps. Only commonality
> is Win XP which is becoming so common that it may be unrelated.  I
> assume Mad Except (not familiar) has to see the exception to be of
> any help?
>

Yes, you'll need to Debug info in your project options. When the
exception occures madexcept will interveption it and grab the stack and
you'll hopefully see where your code last executed and failed.

-AJ

Sean,

<< As more of my client base moves to WIN XP, I am getting more and more
issues where my software is causing  "access violation at address 000000"
type errors. Although a windows error, this doesn't occur with any of their
other software so of course they look at mine instead. Anything I should be
aware of... sharing issues, etc.. I have already made the changes to the
file extensions to get around the Norton issue. >>

Is this direct local access where the application is accessing the tables,
or C/S ?

--
Tim Young
Elevate Software
www.elevatesoft.com

Hi Tim:

All local. And single use systems, no sharing. Thanks, Sean

"Tim Young [Elevate Software]" <timyoung@elevatesoft.com> wrote in message
news:65C0183A-2239-46F3-A7CA-E96BA3495706@news.elevatesoft.com...
> Sean,
>
> << As more of my client base moves to WIN XP, I am getting more and more
> issues where my software is causing  "access violation at address 000000"
> type errors. Although a windows error, this doesn't occur with any of
> their other software so of course they look at mine instead. Anything I
> should be aware of... sharing issues, etc.. I have already made the
> changes to the file extensions to get around the Norton issue. >>
>
> Is this direct local access where the application is accessing the tables,
> or C/S ?
>
> --
> Tim Young
> Elevate Software
> www.elevatesoft.com
>
>

Sean McDermott escribió:
> Hi Tim:
>
> All local. And single use systems, no sharing. Thanks, Sean
>
> "Tim Young [Elevate Software]" <timyoung@elevatesoft.com> wrote in message
> news:65C0183A-2239-46F3-A7CA-E96BA3495706@news.elevatesoft.com...
>> Sean,
>>
>> << As more of my client base moves to WIN XP, I am getting more and more
>> issues where my software is causing  "access violation at address 000000"
>> type errors. Although a windows error, this doesn't occur with any of
>> their other software so of course they look at mine instead. Anything I
>> should be aware of... sharing issues, etc.. I have already made the
>> changes to the file extensions to get around the Norton issue. >>
>>
>> Is this direct local access where the application is accessing the tables,
>> or C/S ?
>>
>> --
>> Tim Young
>> Elevate Software
>> www.elevatesoft.com
>>
>>
>
>
Hi Sean

I had the same problem with computers with hyperthreating, in my case I
removed components that were not threat safe (some Jedi components and
Appcontrols) and the problem was solved.

sorry for my poor english

Job Espejel

Sean McDermott wrote:
> D7 PRO DBISAM - V4 latest, all builds
>
> As more of my client base moves to WIN XP, I am getting more and more
> issues where my software is causing  "access violation at address
> 000000" type errors.

I don't think that it's DBISAM related at all. Our applications are running
on Win98 up to WinXP SP2 with DBISAM 3 and 4.

There are two possible sources for your problem. First, a Job mentioned, a
JCL unit that's behaving wrong on HT machines, google should help and there
is a new version available. Second, there is a problem with a Delphi
procedure that does something with language detection (sorry, that's all I
remember right now) and Execute Protection (the stuff built in the newer AMD
and Intel CPUs). If you use that directly or indirectly, the code for that
procedure is linked into the EXE and of course executed. It does some
strange stuff, putting code on the stack and execute it. That will trigger
an error message. You can switch off the protection for that application.

Ralf