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Access Violation 0xc0000005

Posted on 2004-10-05
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Last Modified: 2010-04-01
I have a small console EXE and DLL, both compiled with the single-threaded debug version of the runtime library. All classes in the DLL are exported and I link to the import library in the EXE. However, I get an application failed to initialize error (0xc0000005) when trying to run the EXE in the IDE or from the command line and the program fails to run. I know it's probably something simple I'm doing wrong or missing, but how do I get around this so I can see that my EXE is actually using the DLL? Thanks.
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Question by:davev
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by:mxjijo
ID: 12232949

run in debug mode (F5). It will stop at the point where it crashes
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Expert Comment

by:Scobar
ID: 12246328
Try checking that your dll exports the correct functions, etc using a program like Dependency Walker.
http://www.dependencywalker.com/ 

Open your .exe program with this and check the functions against your .DLL.
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itsmeandnobodyelse earned 200 total points
ID: 12248727
Set a breakpoint to the begin of the executable. When stopped at break point open menu Debug - Exceptions ... . Locate "access violation" in the exception list below, hilite it and check "Stop Always" radio button. Then run the prog to the crash.

When stopped in Debugger, check the Call Stack Window (if not already shown, right-click to an empty spot somewhere in the menu area of Visual Studio and check "Call Stack"). Check call hierarchy top down til you see any function you've written. Open source and you spotted the line of your code that caused the crash. "Access violation" most likely is a call to a NULL pointer, an uninitialized pointer or a pointer already deleted. It could also be a strcpy or a memcpy where the destination buffer is less than the sopurce buffer. When calling a DLL you couldn't delete a pointer created in the DLL and viceversa. Both might lead to an access violation.

Regards, Alex
 
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