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I just installed a Hotfix (Cumulative patch) on my windows 2003 server, running SP2007 sp2 as I was having trouble with Delay Activity and now get the following error in Visual Studio when entering debug mode with workflow. Any ideas how to cure this ?

Installed :





8/30/2011 6:11:52 PM

Error in vs debug mode:

Error 1 Exception of type 'System.PlatformNotSupportedException' was thrown.

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did you try running the configuration wizard after applying the patch? Please also accept answers for your questions so that you get good responses in the future. – Deepu Nair Jan 15 '12 at 17:52
Visual studio 2008? – Russell Jan 16 '12 at 8:33

Confirm your project is not pointing to .NET 4.0. It may have changed due to an update.

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I ran configuration wizard, project uses .net3.5, re-installed VS2010, re-installed .net 3.5. But no luck, cannot remove patch either in add/remove programs. looks like a re-install of wss3sp2 :( – Raj Chahal Jan 20 '12 at 9:14

CHeck the Platform under your project's Build Tab, it should be set to AnyCPU, not x64 or or x86

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