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.Net (2005) MDI Application runs fine in Windows XP and Vista but fails on startup in Windows 7 64-bit
I am getting my lips beat off. I have an application that is a VB.Net (2005) MDI application. It is developed on Windows XP (SP2) and tested on Windows XP (SP2) and Vista (SP1)....runs great with no problems. The folks I wrote it for installed it on a new laptop running Windows 7 64 Bit Home Premium. The application starts, shows the spash screen and then crashes with the error message "A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is avaliable", then the only option is to click on Close Program (error message screen capture is attached). I went in and set the compatibility mode for the application EXE on the Windows 7 laptop to run in Windows XP (SP2) and granted administrator rights to the application and it still fails (screen capture of these settings attached). This is driving me nuts. It's the first time I've attempted to run a 32 bit developed application on a 64 bit machine and I'm sure that I'm missing something simply but all of the research that I've done over the last 2 days has not helped one bit.
WMCErrorMessage.bmp
WMCCompatibilitySettings.bmp
WMCErrorMessage.bmp
WMCCompatibilitySettings.bmp
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Does the program install into the "program files" folder, and if so does it write to files there. We have a similar problem with our software on Windows 7 and the only solution was to install it outside of "program files"
It is installed in the C:\Program Files(86)\xxxxx. So you installed it outside the Program Files directory and it worked? I will try that now.
Well, one of the things you can do is recompile the project as a 32-bit only application. Recall, that by default, VS2005 uses the Target CPU setting of "AnyCPU"... which means that it will magically convert to a 64-bit application when run on a 64-bit OS. But, if you change the setting to "x86", then it will remain as a 32-bit applicaiton when run on either a 32 or 64-bit OS.
http://msdn.microsoft.com/en-us/library/07bysfz2.aspx
Note that although this will probably fix the problem, but you might wanna go back later and find/fix the real problem.
http://msdn.microsoft.com/en-us/library/07bysfz2.aspx
Note that although this will probably fix the problem, but you might wanna go back later and find/fix the real problem.
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