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Subject:Re: Paradox crashing on terminal server leaves application unrunable
Date:Thu, 1 Dec 2016 11:19:55 -0500
From:Jim Moseley <>

OK, your issue is becoming my white whale!

I just found a cool utility that will show you all the entry points of 
DLLs, called DLL Export Viewer.  If you run this against your copy of 
PXSRV32.dll, you can sort the functions by Relative Address.  I'm hoping 
this relates to the Fault Offset of 0x0009d3c2 from your original 
problem.  If so, this would at least point to what function in Paradox 
is crashing.

Again, feel free to email me your copy of PXSRV32.dll, and I'll give it 
a look for you.

FYI, here's where I got the utility:

Jim Moseley

On 12/1/2016 9:54 AM, Jim Moseley wrote:
> Royce,
> For Process Monitor, start it before trying to start your app.  Then,
> Add a FILTER on 'Process Name' of PDXWin32.exe.  Then, start your app.
> This will show you every file access that happens.  You can then save
> that trace as a CSV and email it to me at jmose (at) NOSPAM dot
> triptracker dot com (without the nospam), and I'll see if I can spot
> anything.
> My guess is that one of the last file accesses will point to where your
> problem is (my bet is PdoxUsrs.LCK or PdoxUsrs.NET).
> Also, A. I. Breveleri wrote a utility years ago called Lockwise.  If you
> run that from the NET DIR folder after the first crash, it will probably
> show corrupt users.  You can also then right-click it and choose 'Open
> Directory Lock Display' to see what is in the PdoxUsrs.LCK files, which
> might point to corrupt locks.
> FYI, here's a link to it from my site, if you can't find it:
> Finally, once the first user crashes, are you able to manually delete
> these files?  If not, what error do you get?
> - %NETDIR%\PdoxUsrs.NET
> - %WORKDIR%\PdoxUsrs.LCK
> - %WORKDIR%\Paradox.LCK
> HTH,
> Jim Moseley
> On 12/1/2016 12:37 AM, Royce Lithgo wrote:
>> The event is the same whether its the first user crash or other users
>> trying to get in.
>> When other users try to get in, sometimes paradox launches but it is in
>> a corrupt state. For example, the File, Open menu is gone. Also it
>> doesn't launch our menu form which is set by command line. Other times,
>> paradox immediately crashes on launch.
>> We never see a table is locked error as you mentioned.
>> I've tried using process monitor to look for dead paradox processes but
>> there aren't any. I guess i could try searching for pdoxusrs to see if
>> there are any open handles on that.
>> On 1/12/2016 3:06 AM, Jim Moseley wrote:
>>> Royce,
>>> Is this event from when the first user crashed, or when the other users
>>> try to get back in?
>>> What happens on the other users' computers right after the first user
>>> crashes?  Do they freeze, get kicked out of Pdox, or just end up with a
>>> 'table is locked' error?
>>> I have a similar issue with Pdox 9 on later Win Servers, and not just
>>> with Terminal Services.  Once a user 'crashes' Paradox, it corrupts the
>>> PdoxUsrs.LCK file.  Then, all the other users start to 'spin' as they
>>> call it, eventually receiving a 'table is locked' error if they wait
>>> long enough.  (I've even seen it drop their shared drive network
>>> connection, which might be a cause or effect of this issue.)
>>> You can trace what is happening using the Process Monitor tool from
>>> Microsoft.  Just filter it to the Paradox process, and it will show you
>>> all file accesses, and whether they were successful.  In my case, it
>>> shows repeated attempts to write to PdoxUsrs.LCK, which all fail.
>>> This is also why you have to reboot.  You can't delete PdoxUsrs.LCK
>>> because it is being used, even if you've forced every network share
>>> session closed on Computer Management.  The issue is that the service
>>> called 'System' is still holding on to this file.  That service is the
>>> NetSVCS service, which handles file sharing.  It typically won't let you
>>> shut/disable that service, since it is busy trying to fulfill old
>>> requests.
>>> HTH,
>>> Jim Moseley
>>> On 11/29/2016 6:07 PM, Royce Lithgo wrote:
>>>> This is really driving everyone crazy. It seems that when paradox
>>>> crashes for a single users on our terminal server, the application can
>>>> no longer be run by anyone and the server needs a restart. The
>>>> application event log has these events:
>>>> Faulting application name: PDXWIN32.EXE, version:, time stamp:
>>>> 0x60c220a3
>>>> Faulting module name: PXSRV32.dll, version: 6.3.9600.18233, time stamp:
>>>> 0x56bb4e1d
>>>> Exception code: 0xc0000142
>>>> Fault offset: 0x0009d3c2
>>>> Faulting process id: 0x3c84
>>>> Faulting application start time: 0x01d24a8a404094ce
>>>> Faulting application path: C:\Program Files
>>>> (x86)\Borland\Paradox\PDXWIN32.EXE
>>>> Faulting module path: PXSRV32.dll
>>>> Report Id: 8433d39c-b67d-11e6-811f-00155d1e4601
>>>> Faulting package full name:
>>>> Faulting package-relative application ID:
>>>> I'm not sure why exactly a restart is required. Sometimes if the user
>>>> who crashed logs out, the issue is resolved. But usually no one owns up
>>>> to being the one who crashed it and they don't follow the procedure (of
>>>> logging out immediately after a crash).
>>>> Is it possible that PXSRV32.dll somehow gets corrupt as is still
>>>> resident in memory even though there's no PDXWIN32.EXE processes
>>>> running?

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