Qt Application throws an Access violation exception during startup

I have a Qt Application that works in Debug mode without any problems. Since two days I'm trying to make it work in Release mode. After some Project property modification I managed to compile without errors. But unfortunalty the application crashes before even reaching the main method. That's my environment:

• MS VS 2010
• Qt 4.8.4
• Qwt 6.0.0

I don't know if this is relevant, but I also installed the Qt plugin for VS and used Qt Designer to create my GUI.

As I said in Debug mode there is no problem. Starting the release version from the Visual Studio produces the following error: Unhandled exception at 0x77c415de in Application.exe: 0xC0000005: Access violation reading location 0x0000000c.

The last function I can "debug" is the the "WinMain" method called inside the method "__declspec(noinline) int __tmainCRTStartup", which is located in crtexe.c (honestly I have no idea what this is). The call stack looks like this:

ntdll.dll!77c415de()    
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll] 
ntdll.dll!77c415de()    
ntdll.dll!77c3014e()    
msvcr100.dll!718f0269()     
msvcr100.dll!718f233b()     
msvcr100.dll!718f233b()     
msvcr100.dll!718f233b()     
QtCore4.dll!5b2cfc49()  
QtGui4.dll!57bf54ea()   
Application.exe!__tmainCRTStartup()  Line 547 + 0x1c bytes  C
kernel32.dll!754633aa()     
ntdll.dll!77c59ef2()    
ntdll.dll!77c59ec5()    

In the moment I'm totaly lost with this problem. No idea what to try further...

I've tried to reduce the program and commented out the complete main function. But the result was the same behaviour. As I said the error occurs even before the main function is called. I also turned off all optimization and recompiled... didn't changed anything.

What completly puzzles me, is the fact that it "works" when I call "Application.exe" from the command prompt (ok it also crashes but much later during execution). Weird, isn't it? What is the difference between starting from command prompt and starting from Visual Studio application?

The problem is not in QT but in your source code. "0xC0000005: Access violation reading location 0x0000000c" means that you try to access a wrong memory location.

Check out your arrays, ans pointers.