I am trying to open a file in a program called DavkaWriter. Most of the files generated from this program I can open. I am facing an issue with a certain file. The software just crashes. I opened DavkaWriter in x32_debugger. I am attaching a screenshot of what looks like the issue. I am running this software on Windows 10 64 bit. The exact error code is "First chance exception on 005004C2 (C0000005, EXCEPTION_ACCESS_VIOLATION)!" The picture is attached as a link. This may be an amateur question but I have never debugged before. Thank you for your help!
First chance exception on 005004C2 (C0000005, EXCEPTION_ACCESS_VIOLATION)!
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I have inherited a program written in VB 6 that is not working when the user tries to print. I had some ocx files I needed to register (regsvr32), which I found using Process Monitor, but I can't see where this error is coming from. Is it possible to find out what component the program was trying to create? This program was written by someone else and I don't have access to anything but the original setup program. Thanks.
So the issue was not the old program, but something to do with Access. I happened upon some articles dealing with this particular issue, but nothing worked. I had to install Access 2013 32 bit in order to make this work. I didn't really fix the cause of the problem, but I wanted to put this here to point any future sufferers they check Office and their program if they run into a similar issue.
HTH
Wade
I have the following bug in a program:
An MDI MFC program closes silently on Windows 7 (terminates the process without prompting to save changes and without displaying any "crash" dialog) when the user performs this operation : Click a context menu item.
But this happens only on that PC, at least, for the moment. No other PC has encountered that problem. However the bug can always be reproduced following the same steps but only on that PC.
I want to know the reason but probably the customer won't allow me to install many programs to debug, so I need to be able to log when the program terminates, or print the stack in Release version but I'm quite lost.
I had faced a similar bug before and eventually I fixed it logging line by line and changing the problematic part, but I guess there are much better ways to find bug reasons than this.
I have tried on my development PC to create minidumps on Release mode but if there is no exception thrown on that PC, (I haven't confirmed that yet, though...) maybe it's pointless.
Also used an available class on codeproject (Stackwalker) but I don't manage to print all the function calls. Only on simple console programs, but not on MDI or even SDI.
Any ideas on how to find out the reason? Thanks in advance.
recently I encountered a problem. Every time when I make some changes in page after I debug it on device when going to said page the app minimizes (crashes) and after about 30-50 seconds in output window I get
The program 'XXX' has exited with code -1073741819 (0xc0000005) 'Access violation'.
But when I uninstall and then debug again It works. I already tied reseting phone. Is it something with my debbuger or more likely with my code?
Edit:
Right now sometimes it occurs and sometime it doesnt ... I'll need to inspect code more. Is there a way to obtain more debug info with Access violation information?
I'll post as answer so others can see it easily.
You can see the dump of debug on the test device, Follow this
link.
Basically the link explains how to turn on "Save Information option" from Feedback application inside Settings of your device. After that when you debug the app, you will find dump file of your application inside,Phone -> Documents ->Debug.
Please post a sample of your code. I had similar problems when I tried using {unsafe code} and included pointers. They are extremely useful, but often lead you to memory problems (reading from a NULL pointer or something like that), so check if that's your problem.
Good luck
I have created a program which runs 2 threads synchronized using events (SetEvent(), WaitForSingleObject(), WaitForMultipleObjects()) in Visual Studio 2010. The following happens:
when I run this program using the debugger it runs for a certain time and then crashes
when I run this program without debugging (.exe file) it crashes directly
when I run this program in another computer using the debugger it crashes immediately and via .exe file it crashes after some time
The following error has been reported when debugging:
Unhandled exception at 0x5eafcaf7 (msvcr100d.dll) in test.exe: 0xC0000005: Access violation reading location 0x0036f000.
Could somebody bring some light to this topic as I don't know where to start searching? Which is the difference between running the code in the debugger or without? (Which kind of code is added?) Why do the different computers have different behaviours when running the same code?
In both computers there is exactly the same operating system (Windows 7) and I assume the same libraries and patches.
Thank you for your help!
EDIT 11.12.2012
I have installed Application Verifier and get in Visual Studio some errors displayed as this:
===========================================================
VERIFIER STOP 0000000000000013: pid 0x1E18: first chance access violation for
current stack trace
000000000874F000 : Invalid address being accessed
000000005201CAF7 : Code performing invalid access
000000000009E440 : Exception record. Use .exr to display it.
000000000009DF50 : Context record. Use .cxr to display it.
===========================================================
Does somebody know how I can see which address belongs to which line of code to know exactly where the exception occurs? I have also read in the Help of the program that using the command "!heap p -a ACCESS_ADDRESS" should give details about the nature of the error and what heap block is overrun. Where should I place this command using Visual Studio?
When working in a multi-threaded environment, things can happen at different speeds on different threads. Trying to identify the possible cause without the relevant code is quite difficult.
The error is a general memory access violation error. This usually occurs when a variable being returned from a function is bigger than expected, or different type.
Can we see the code please?
I have been running an application developed under Windows 7 in Delphi XE on Windows 7 machine for about 3 weeks non-stop, but it stopped working after that and popped up a message box with "Control doesn't have parent window." After that nothing seem to work right in the software, unless it is shutdown and restarted.
I have an idea of what that error means, but I am trying to figure out. Why?
Any hints or suggestions will be greatly appreciated. Thank you.
Sign of a resource leak, window handles most likely. Diagnose with TaskMgr.exe, Processes tab. View + Select Columns and tick Handles, USER Objects and GDI Objects. Keep on eye on the values for your program while you are using it. A steady increase spells trouble, Windows stops giving more after 10,000.
If that doesn't help then improve your exception handling so you can get a better diagnostic, a stack trace is important to diagnose trouble like this.
You should install a copy of MadExcept, JclExcept, or other exception handling library that supports displaying/logging the call stack when an uncaught exception is raised (if you cannt reproduce the exception while running inside the IDE debugger, that is). Then you can figure out what your app was trying to do at the time of the exception, and hopefully narrow it down to the spot in your code that is accessing the specific UI control that is missing its Parent window.