$251E error on XP SP2???

Hi Experts,

Here's an issue i'm having. In a company with 8 machines, running Windows XP Professional. My application is running fine. Running Interbase 6. My client recently bought 3 new machines, Mecer Extreme machines with Hyperthreading with Windows XP SP2.

Here's the funny thing. Only on these 3 new machines does my programme not work. As I open the .EXE file, it comes back with a $251E error code. I've done some searches and it says this is a memory issue? This could also come about by a firewall or antivirus software conflict.

I removed the firewall, and disabled the antivirus software, allocated more memory (pretty much every fix you can find when googling "$251e borland")

As this is only on these 3 new machines, and the rest work 100%, I suspect there's something on this XP that is causing issues. Can anyone show me the light and guide me in the right direction?

Thanks a lot,

My client is getting upset to the extreme as I cannot find the issue with the machine. So this is getting a full 500 points for help.
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chrispolsAuthor Commented:
I'm asuming it's an Interbase problem, but it's a Delphi program. Could there be any relationship?
Nick UpsonPrincipal Operations EngineerCommented:
I suspect this is your problem "Mecer Extreme machines with Hyperthreading " - disable the hyperthreading in the Bios
chrispolsAuthor Commented:
I'll check that again, apparently a tech disabled it but to no resolution.
Is there a special reason why hyperthreading would give issues?. Would a later M$ update possibly resolve the issue?
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Nick UpsonPrincipal Operations EngineerCommented:


an upgrade to interbase 7.5 (buy it from borland) or firebird, www.ibphoenix.com (free open-source) would help
Nick UpsonPrincipal Operations EngineerCommented:

"When running older versions of InterBase (prior to 7) on a hyper-threading processor, you should either disable hyper-threading in the BIOS settings (preferably) or use the process affinity mask to constrain InterBase to a single logical CPU in order to prevent performance problems similar to those that older versions of InterBase server experiences on a SMP system."

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$251E = "Insuffient shared memory available"
Sometimes the program can not be started or an error occur during the lunching
If the error message includes the code $251E , and you have windows 2000 o XP , you may fixed by right clicking in the program icon, go to properties ->Compatibility tab and UNCHECK "Run this program in compatibily mode". I had the same problem and that fixed it.
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