Issue with running Unit Test in Visual Studio 2012

Question

I am getting the following error while building unit-test.

Error: "IUnitTestStorage.Open should be called before operation can continue."

I have never got this error before and all was working fine before this moment.

I have tried deleting all bin and obj files and rebuillding, it didn't help. Moreover, when I created new unit-test project (with no code of mine) and it gives the same error.

Closing all Visual Studio instances and starting them back didn't help as well.

I am using Visual Studio 2012 Premium Update 4.

Answer 1

I just closed and re-opened VS2015 and cleaned solution and it worked for me

Answer 2

I got it today in Visual Studio 2015. Just delete all in debug folder, release folder and all in obj folder.

Build the solution then it works out.

Answer 3

It's an issue with Updated version of Telerik Test Studio. Try Re-installing Telerik Test Studio to Resolve this. It works for me.

Answer 4

According to this it helps to clean and rebuild solution, not just build. I know it's little bit silly but in case you haven't tried it...