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Subject Topic: Btrieve 6.15 and XP Pro locking Post ReplyPost New Topic
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Balboa
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Posted: 19 July 2010 at 8:49am | IP Logged Quote Balboa

Hi

I have a program developed with Magic 4.20h with a database Btrieve 6.15 on a server Novell 6.5
The PC is equipped with the OS Windows XP and all functions well since years
PROBLEM: I have a problem with the new PC equipped with a QuadCore processor. The program is blocked during a few minutes then is released. I have no error message during the time of blocking and the PC is perfectly usable by the other programs

Here the file batch for launching the application:

@ECHO OFF
        SET NETHASPPROTOCOL=IPX
        MGSWAP
        ECHO Multi-utilisateur
        BREQUEST   /R:25 /S:1 /D:4096
        IF .%3==.D          ;   GOTO MGEN
        IF .%3==.d          ;   GOTO MGEN
:MGRT
        ECHO Run-time
        MGRNT /CONST=%1 /TERMINAL=%2
        GOTO   MG_END
:MGEN
        ECHO Developpement
        MGGEN /CONST=%1 /TERMINAL=%2
        GOTO   MG_END
:MG_END
        MGSTOP
       

Thank you for your help

 

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mirtheil
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Posted: 19 July 2010 at 11:52am | IP Logged Quote mirtheil

At what point in the launching of the application is the "blocking" occurring? 
I'm not aware of any problems with Btrieve 6.15 BREQUEST and Novell servers.  At the same time, Btrieve 6.15 hasn't been updated since 1997, if I remember correctly, and has not been supported by Pervasive since about 1998. 

If you were to upgrade to PSQL v9 (the last version that supports Novell NetWare), you can also get rid of BREQUEST and replace it with BTRBOX (a technology that lets DOS apps use the 32 bit requesters).  It helps. 
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Balboa
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Posted: 20 July 2010 at 11:07am | IP Logged Quote Balboa

Hi

In fact the application launches normally, and we can use normally during a few minutes
Then it is blocked during a few minutes
Then the application is released without intervention and we can to use (since the place where it was blocked)

On another forum, a member wrote concerning this problem:
If the quadcore box is running too fast, then you might want to try
restricting the process to a single CPU only. To do this, bring up the
Task Manager and right-click on the process you want to run. Select
"Set Affinity..." and enable it on ONE CPU only

BUT what is the process with brequest ?

 

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mirtheil
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Posted: 20 July 2010 at 11:14am | IP Logged Quote mirtheil

BREQUEST.EXE is a Terminate and Stay Resident (TSR) program.  It doesn't show  as a process because it's part of the NTVDM.  You would actually set the application's affinity or possibly the whole NTVDM.EXE process not BREQUEST.

When the "blocking" occurs, what is being done in terms of Btrieve?  If you're not in the middle of a Btrieve call, it may be something else causing this blocking.
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Balboa
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Posted: 23 July 2010 at 11:48am | IP Logged Quote Balboa

When blocking occurs, one of the 4 cores processor is with 100% utilization
But the PC does not do anything

The same application with the same configuration on a PC with dual core functions without problem

According to you does the problem come from Btrieve, Novell or Magic ?

Thank you
 
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mirtheil
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Posted: 23 July 2010 at 1:46pm | IP Logged Quote mirtheil

I don't know where the problem is coming from. 
I've never seen anything like this.  That being said, you are using an extremely old version of Btrieve, Novell, and probably Magic.  Any one of those could be causing an interaction that's blocking the system. 
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