Question

I’m developing a WPF with WCF app on .NET 4.0, the machine in which is being developed is a Windows 7 64 bit SP1. The app has already been installed in several machines with different configurations (Win XP, Vista, 7, and even POS), summing up to a total of around 20 different machines.

Yesterday I went to install it on a new customer, and the app just crashed with no error message (probably due to my several try catches along the code). The only message that showed was something like: The App stopped working, Windows is trying to find a solution.

Tried different configurations and nothing, until I noticed that the client machine is a Win XP 64 bit, which I believe I’ve never came across until now.

I searched the web, and read somewhere that there was a compatibility issue with Win XP x64 and .NET 4.0. I don’t know if this is the case.

Do I have to downgrade my app to .NET 3.5?? Or do I have to create a 64 version, or is it the client machine that has a problem?? I can’t recreate the issue on my PS, even with Win XP installed on virtual machine, so I’m flying blind.

Answer 1

All you need is to install Windows Imaging Component, which is mentioned in .NET Framework download page,

http://www.microsoft.com/en-us/download/details.aspx?id=17851

Important: Make sure that your computer has the latest Windows service
pack and critical updates. To find security updates, visit Windows
Update. If you are installing on XP 64 bit or Windows 2003 you might
need to install the Windows Imaging Component. The Windows Imaging
Component 32 bit can be found here . The Windows Imaging Component 64
bit can be found here .

Anyway, you should debug the crash as @Daniel Hilgarth recommended, as that can tell if WIC is the culprit.