Visual Studio 2012 Update 2 CTP 3–After updating, editing work items from web gives you TF400898: An Internal Error Occurred.

For those of you installing the VS Update 2 – CTP3, there is an installation sequence that will put the web access work item tracking in a state where editing work items displays this error:

If you install

• VS 2012 RTM
• VS 2012 – Update 1
• VS 2012 – Update 2 – CTP3

and

• TFS 2012 RTM
• TFS 2012 Update 1

but do not install

• TFS 2012 Update 2 – CTP3

andyour VS is installed on the same box as your TFS Server,

You can run into a situation where your DLLs are mismatched and you receive the above error.

Your workaround is

• Uninstall VS 2012 – Update 2 - CTP3

or

• Install TFS 2012 Update 2 - CTP3

This will put the DLLs in synch, and you should work again.

This is all be tracked under this Connect bug: http://connect.microsoft.com/VisualStudio/feedback/details/779130/team-foundation-server-2012. (Thank you to Mr. Clarkson for reporting this bug)

We will fix this bug, before VS Update 2 and TFS Update 2 goes RTM.