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Access violation error when I open the Gixen Desktop Manage

 
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frankb1290
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PostPosted: Tue Oct 02, 2012 9:30 am    Post subject: Access violation error when I open the Gixen Desktop Manage Reply with quote

Hello Mario,

I've been using Gixen from your web page for a year or so. Congratulations for your great little application.

Today I have downloaded & run the GDM for the first time, on order to get the highest bids actualized on real time.
I use Windows XP SP3 (I believe) and won't "upgrade" any time soon.

When I call GDM, I always get the following warning, twice:
Access violation at address 00... in module 'GixenDesktopManager.exe' Read of address 00000000.

After those warnings GSM works all right, or so it seems to me.

What are those "access violations" and how do I get rid of the annoying warnings?

Thanks in advance,

Frank
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PostPosted: Tue Oct 02, 2012 9:52 am    Post subject: Reply with quote

Well, it looks like it is de-referencing a Null pointer, but why it does that for you and no-one else is a mystery... is frankb1290 your eBay id?... Maybe Mario can try it as you and see if he can reproduce the error.

Did/do you get that error before or after it prompts you for your eBay id and password?
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frankb1290
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PostPosted: Wed Oct 10, 2012 10:22 am    Post subject: Reply to Mark Reply with quote

Hello Mark,

Excuse my late answer to your reply, that I saw only today.
I expected the Gixen forum to warn me with an email when and if someone replied to my post, but got none therefore I thought nobody did.
Now I realize that Gixen has not my email address in the first place.

<< Well, it looks like it is de-referencing a Null pointer >>
If you say so... Smile

<< but why it does that for you and no-one else is a mystery. >>
Perhaps because other people who got the same warning thought that the Gixen Manager would not run on their systems and left it at that.

<< is frankb1290 your eBay id? >>
Yes.

<< Maybe Mario can try it as you and see if he can reproduce the error.>>
Well, if I am the only one who has reported this bug (either Gixen's or Windows') then I would not care.

<< Did/do you get that error before or after it prompts you for your eBay id and password? >>
GDM produces the error warning twice each time after the program starts, but does not prompt for those data.

Frank
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Joined: 09 Aug 2007
Posts: 7969
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PostPosted: Wed Oct 10, 2012 11:58 am    Post subject: Reply with quote

Hi Frank,

Since it does not ask you for your credentials presumably you have asked for it to save them so that there is no need to prompt at start up?

As a test maybe you could remove the gixen.ini file in the same directory that you are running the application from... and then start it again... that way it should prompt again for those credentials when you start it up... and then report back when and if you get the errors that you reported again.
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PostPosted: Wed Oct 10, 2012 11:58 am    Post subject:

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mario
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PostPosted: Wed Oct 10, 2012 12:12 pm    Post subject: Reply with quote

I remember the "null pointer" problem being reported only one other time. I have no idea what is causing it in your case.
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frankb1290
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PostPosted: Thu Oct 11, 2012 4:16 am    Post subject: An infrecuent bug in GDM or Windows XP Reply with quote

To Mark:

<< ... presumably you have asked for it to save them ... ?>>
Yes, I did that.

<< As a test maybe you could remove the gixen.ini file ... and then start it again... that way it should prompt again for those credentials...>>
Correct, I just did that again.

<< and then report back when and if you get the errors that you reported again. >>
Yes, same error again.
---

To Mario:

<< I remember the "null pointer" problem being reported only one other time.>>
Ah, there nothing new under the sun after all. Smile

<< I have no idea what is causing it in your case. >>
Do you also remember what was the reason in that former instance?
Anyway, as I said before if nobody else complains about this bug, it cannot be important.

May I ask where do you come from, Mario?

Frank
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PostPosted: Thu Oct 11, 2012 5:01 am    Post subject: Re: An infrecuent bug in GDM or Windows XP Reply with quote

frankb1290 wrote:
Yes, same error again.


When did it come up?... Before or after you entered your credentials?

If I remember correctly we have never found out why this error occasionally occurs... it would be nice to work it out so that it doesn't happen again for anyone.

Mario lives in Canada... I don't think that is a secret... I hope not...
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frankb1290
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PostPosted: Thu Oct 11, 2012 5:50 am    Post subject: De-bugging GDM, where to start? Reply with quote

Mark,

<< When did it come up?... Before or after you entered your credentials? >>
Before.

<< it would be nice to work it out >>
All right, I will certainly collaborate to that purpose.
Where do we begin? I have no idea.

Frank
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PostPosted: Thu Oct 11, 2012 8:18 am    Post subject: Re: De-bugging GDM, where to start? Reply with quote

frankb1290 wrote:
Where do we begin? I have no idea.


Unfortunately nor have I really, it evidently has nothing to do with your account since it comes up before it attempts to do anything involving your account.

So that points to it being to do with the set up of your computer... but I think Mario already has a Windows XP SP3 system and it evidently doesn't happen on that.

If my job was to track this down I would produce a debug version of the application, perhaps with a certain amount of logging in it... with an attempt to catch null pointer dereferences (if the language that it is written in supports it) get you to run that and return the log file(s) produced and gradually track down exactly where it is happening... but that could be a very long and laborious task for all involved... I don't know if it is worth going to that much effort if after the warnings it functions correctly from then on... which I think is what you have said?
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frankb1290
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PostPosted: Sun Oct 14, 2012 2:17 pm    Post subject: This bug is truly worthless Reply with quote

Good evening, Mark,

I'd swear that I wrote & sent an answer days ago but I cannot seen it in the forum, so here goes it again.

<< it evidently has nothing to do with your account >>
Correct.

<< So that points to it being to do with the set up of your computer. >>
That's it.

<< but I think Mario already has a Windows XP SP3 system and it evidently doesn't happen on that. >>
Yes, there must be dozens if not hundreds of people using GDM on Windows XP who have not complained. However there are so many different settings, "services" and so on, that the source of my error could still be very much Windows-dependent.

<< [debugging] ... I don't know if it is worth going to that much effort ... which I think is what you have said? >>
Well, that's an understatement of my own dismisal of the problem. I mean, I think it is NOT worth-while to track & solve this unimportant bug. Smile

What I would do instead if I were Mario, is to add a "refresh" buttom to the web Gixen, so that current bids are actualized. I know this desirable feature has been discussed before but cannot understand the reason why it is not implemented.

Frank
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PostPosted: Mon Oct 15, 2012 12:56 am    Post subject: Re: This bug is truly worthless Reply with quote

frankb1290 wrote:
What I would do instead if I were Mario, is to add a "refresh" buttom to the web Gixen, so that current bids are actualized. I know this desirable feature has been discussed before but cannot understand the reason why it is not implemented.

Frank


Real time updates were a part of Gixen many years ago, they were removed because the amount of resource that they take is too high (read expensive if you will) and affected the more important task of sniping and of providing a web interface that is available all the time.

Put simply if Gixen were able to charge $200 a year for all users it might be worth investigating increasing capacity to be able to handle this feature again... but that isn't going to happen as it goes against the ethos of the site of being a cost effective solution.
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