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.
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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