Symptoms
Visual Studio cannot open K2Proj files. I have .net version 4.6.1 installed and I suspect that this problem is because of that. But I could not remove 4.6.1 as it is not installed through windows update.
I also tried cleanup utility provided by Microsoft to cleanup .net version but still framework is there.
Can you please help, as we are facing this issue on machines with Windows 10 having framework 4.6.1
Diagnoses
From ticket details you are running K2 4.6.10 if you look at the k2 compatibility matrix:
http://help.k2.com/blackpearl/support-matrix#VisualStudio ----andgtvs2010 is compatible
http://help.k2.com/blackpearl/support-matrix#Windows Client Components3 ----andgt windows 10 is not compatible
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Resolution
My Last response was:
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From ticket details you are running K2 4.6.10 if you look at the k2 compatibility matrix:
http://help.k2.com/blackpearl/support-matrix#VisualStudio ----andgtvs2010 is compatible
http://help.k2.com/blackpearl/support-matrix#Windows Client Components3 ----andgt windows 10 is not compatible
This is the official response from k2 on this issue:
As you know we do not currently support .net framework 4.6.1.
Microsoft shipped framework 4.6.1 as a recommended update in the following KB: https://support.microsoft.com/en-us/kb/3102467 the net result being that any windows machine that has automatic updates enabled will be getting the new framework version installed.
As a result you are likely to see failures in the product specifically in PandampD and VS when this framework version is installed.
A typical error message would read: Whenever attempting to open a solution it displays the following error: The 'WorkflowPackage' package did not load correctly. The problem may have been caused by a configuration change or by the installation of another extension.
You can uninstall .NET Framework 4.6.1 by going to Control Panel andgt Programs andgt Programs and Features andgt Installed Updates. Scroll down the list of Microsoft Windows updates to find Update for Microsoft Windows (KB3102467) and click Uninstall.
It might be worth looking at the .net clean-up tool to speed this up
https://blogs.msdn.microsoft.com/astebner/2008/08/28/net-framework-cleanup-tool-users-guide/
*Note .net framework 4.6 is the base framework version in windows 10 so no need to reinstall, not relevant to windows 7 or older version of windows server where especially if you are running VS2015 you might need to reinstall .net framework 4.6.
To stop the update being pushed out again you can hide it as per this URL: http://www.thewindowsclub.com/block-unwanted-windows-updates-in-windows-10
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