On 1/29/21 3:52 PM, Nikolay Nikolov wrote:
On 1/29/21 12:37 PM, James Richters wrote:
Any idea what’s causing this crash yet?Is there some way I can at
least detect the error and handle it myself instead of crashing?
I'll take a look and try to reproduce it today or tomorrow. Sorry,
I've been busy lately.
Ok, I reproduced it today. It appears that DirectX applications lose
access to their DirectDraw surfaces when a UAC screen appears. Thanks,
Microsoft! I'll need some time to provide a proper fix for that, but for
now you can try this as a workaround. Create a text file, called
ptcpas.cfg in your program's directory and type a single line in it:
GDI
This will disable the DirectX console and use GDI for rendering. This
might be slower (although, you might not notice the difference on a
modern PC), but should get rid of the problem. Please let me know if it
doesn't work.
I'll try to get this fixed in the DirectX console as well, but that
requires more careful analysis and testing on different versions of
Windows, so it'll take some time.
Hope this helps,
Nikolay
James
**
**
*From:*fpc-pascal <fpc-pascal-boun...@lists.freepascal.org> *On
Behalf Of *James Richters via fpc-pascal
*Sent:* Monday, January 11, 2021 9:37 AM
*To:* 'FPC-Pascal users discussions' <fpc-pascal@lists.freepascal.org>
*Cc:* James Richters <james.richt...@productionautomation.net>;
'Nikolay Nikolov' <nick...@gmail.com>
*Subject:* Re: [fpc-pascal] PTCGraph Causing 217
I’ve made a sample program that demonstrates the problem
https://gist.github.com/Zaaphod/936901eb5f31df5044d2bd36a7cf6c91
<https://gist.github.com/Zaaphod/936901eb5f31df5044d2bd36a7cf6c91>
When I was testing it, I found out that the problem shows up also
with PTCCRT.Keypressed,
Procedure to re-produce bug in Putimage
1.Run program in Windows
2.Do something that activates Windows User Account Control like open
an administrator command prompt
3.Program crashes with exitcode 217 EAccessViolation: Access
violation on line 108 which is doing Putimage, even if you answer NO
to user account control
Procedure to re-produce bug in Keypressed
1.UnComment //Until ptccrt.Keypressed;Comment out //Until
ptccrt.Keypressed;
2.Run Program in Windows
3.Do something that activates Windows User Account Control like open
an administrator command prompt
4.Program crashes with exitcode 217 EAccessViolation: Access
violation on line 114 which is doing Keypresed (sometimes the error
is on putimage)
Other things that cause it:
Unplug monitor and plug it back in
Change Display settings
Putting computer to sleep
Unknown reasons… system just idle
James
*From:*fpc-pascal <fpc-pascal-boun...@lists.freepascal.org
<mailto:fpc-pascal-boun...@lists.freepascal.org>> *On Behalf Of
*Nikolay Nikolov via fpc-pascal
*Sent:* Thursday, January 7, 2021 2:17 AM
*To:* fpc-pascal@lists.freepascal.org
<mailto:fpc-pascal@lists.freepascal.org>
*Cc:* Nikolay Nikolov <nick...@gmail.com <mailto:nick...@gmail.com>>
*Subject:* Re: [fpc-pascal] PTCGraph Causing 217
On 1/6/21 5:44 PM, James Richters via fpc-pascal wrote:
I’ve been having issues with PTCGraph causing a runtime Error 217
: EAccessViolation: Access violation at seemingly random times in
my program.The error is always on a line with either GetImage()
or PutImage() but not the same one.The program can run for hours
with no problems doing GetImage and PutImage every second or so,
and then it just stops with this error.
I know that if something disrupts the screen… like if I install a
program and the Windows user control thing asks for a password,
that ALWAYS causes this to happen, or if I unplug my monitor and
plug it back in…. I find that this happens.. but lately it seems
to happen for no reason.
I don’t know enough about it to track it down, but is there some
way I Can find out what causes this and prevent the error?It
would be nice if I could detect the condition that causes this
issue, and if I find that the issues is present, just stop trying
to do Getimage() or PutImage() until the condition is resolved.
Can you provide an example program and exact steps to reproduce this bug?
Nikolay
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