App fails silently on 64-bit Vista

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RickMohr

New Member
I've developed an application that runs great on 32-bit Vista. But a user reports that when launched on 64-bit Vista it exits immediately with no error message.

I don't have access to a 64-bit Vista machine to test with. Any ideas of likely places to look? I make many calls to the Windows SDK via [DllImport(user32.dll)]. After a fair amount of searching I don't see anything saying that that should be a problem. Should it be?

Thanks for any ideas.
 

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enable auditing and check the event log. Is it a true 32-bit app? You can't use any 16 bit on 64-bit.
 

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RickMohr said:
I've developed an application that runs great on 32-bit Vista. But a user reports that when launched on 64-bit Vista it exits immediately with no error message.

I don't have access to a 64-bit Vista machine to test with. Any ideas of likely places to look? I make many calls to the Windows SDK via [DllImport(user32.dll)]. After a fair amount of searching I don't see anything saying that that should be a problem. Should it be?

Thanks for any ideas.
Click to expand...

As a developer wouldn't it be better for you to find or work with someone who has a 64bit OS and figure out why it fails? You have a much better understanding of how the program works...you developed it.

I'm a little confused as to what it is you're asking? Plus you don't say or describe what the program is or does.

Just curious
 

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I read up a little on auditing. I believe it is turned on by changing the Security Policy using SecPol.msc, but unfortunately that tool is not included in the Home versions of Vista.
 

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So far I've found no friends with 64 bit Vista. Still looking.

My application is a language for creating voice commands. The previous version (Vocola Information Pages - Introduction) works with dragon naturallyspeaking. The new version uses the powerful speech recognition capabilities built into vista.

It's written in c# using .NET 2.0. I have a try/catch around everything in my Main() routine through Application.Run(), but apparently no exceptions are fired.
 

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.net does not give meaningful errors. You might need a debug program for C that can walk through. Can you turn on verbose logging in the app itself?
 

My Computer

System One

  • CPU
    pair of Intel E5430 quad core 2.66 GHz Xeons
    Motherboard
    Supermicro X7DWA-N server board
    Memory
    16GB DDR667
    Graphics Card(s)
    eVGA 8800 GTS 640 MB video card
    Hard Drives
    SAS RAID
Thanks. I was just curious. I'm not a programer so it's all greek to me. I just figured if you explained what the program did someone here might be able to help you.

LOL no one you know has Vista 64, guess its just not as wide spread as we like to think.

Good luck in getting it sorted.
 

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  • Manufacturer/Model
    Custom Built
    CPU
    Intel Core 2 Quad Q6600 2.4GHz
    Motherboard
    Intel D975XBX2
    Memory
    Corsair TWIN2X4096-PC8500 (2x2GHz)
    Graphics Card(s)
    ATI Radeon HD 4890 (1GHz)
    Sound Card
    X-Fi Titanium - Fatality Pro Series
    Monitor(s) Displays
    hp w2207h (22" widescreen)
    Screen Resolution
    1680 x 1050
    Hard Drives
    One 750GB, 2x500GB Western Digital Caviar Black Hard Drives (32meg)
    PSU
    Antec Neo HE 550
    Case
    Antec P182
    Cooling
    Zalman CNPS9500 AT
    Keyboard
    Logitech Wireless Wave
    Mouse
    Logitech MX Revolution
    Internet Speed
    "High" Speed DSL? Is that like low speed FIOS?
    Other Info
    Q6600 B3 Revision OC to 3.0GHz
I suspect you have a x86-x64 marshalling problem with your native API calls. Try recompiling the app as 32-bit only. Go to Project Properties -> Build -> Platform target and change it from "Any CPU" to "x86". That will at least eliminate any 64-bit marshalling problems.
 

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