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Created attachment 10809 [details]
Screenshot of error in Visual Studio
Visual Studio 2013 Update 4
After the latest update, I know have an option for "Test Cloud" in the Output window in Visual Studio. Without doing anything other than loading my project, the output from "Test Cloud" is
ERROR: Value cannot be null.
Parameter name: project
This is causing an error (build error) in the Error List window.
I tried a few experiments with iPhone and Forms template projects created using either the new project dialog in Xamarin Studio (that automatically adds references to the "Xamarin Test Cloud Agent" NuGet Package).
When I have a project that includes a "Xamarin Test Cloud Agent" package installed, I can produce some output in the "Output" -> "Test cloud" window if I use the "Run in Test Cloud" context menu option on the UITest project.
But so far I have not been able to reproduce the "ERROR: Value cannot be null. Parameter name: project" message.
## Possible next steps
If you can reproduce the problem with a brand new project (created using one of the built-in templates), that would be good to know.
If you _cannot_ reproduce the problem with a brand new project, then the most direct way to proceed would probably be to zip up a project that demonstrates the problem and attach it to the bug report. The last couple of "Additional details" from  might be helpful in creating a test case. The information on that article about contacting support might be helpful too.
>  https://kb.xamarin.com/customer/portal/articles/1910343-when-and-how-should-i-file-a-bug-report-#note-5
(If this link redirects to the top-level kb.xamarin.com/ page the first time you click it, try clicking it once more.)
Thanks in advance!
Created attachment 10936 [details]
Logs from %LOCALAPPDATA%\Xamarin\Log
Created attachment 10937 [details]
Solution that causes the error.
I tried making a new project and it did not give the error. I currently don't have any UI Test projects and am not using Test Cloud. I rolled back to the stable channel and had no error. I switched back to Beta and had the error again.
I have attached my project. It can also be found at: https://github.com/valdetero/SevenDays.
Created attachment 10938 [details]
Android build tools screenshot.
Many thanks for all the additional details and the sample project.
Just to confirm the steps to reproduce if you get a chance, is it sufficient to open "SevenDays.sln"? After you open the solution, it sounds like you immediately see the error in the Test Cloud output about "Value cannot be null. Parameter name: project". Correct?
Created attachment 10999 [details]
After latest update
Yes that is correct. Just opening the solution causes the error. However, I just realized that everytime I right-click on an unloaded project, it generates another error. I tried this with winphone, ios, and pcl projects.
I'm updating the target milestone to ensure an initial assessment before service release 1. Since we have seen a few reports of the problem already, there is a fair chance we will start seeing more reports as customers continue to upgrade to 3.11.
I'm also updating the severity to reflect that this problem blocks development for the users affected by it.
Adjusting the severity back to Normal based on observations that these errors do not block building, deploying, or debugging (as it turns out, comment 10 was inaccurate).
The errors are quite confusing when building because they appear after the build completes, but the build apparently completes successfully despite these error messages.
I'd still say this is worth an assessment before service release 1 is finalized because the error messages are quite confusing.
## Possible partial workaround
Assuming this error is indeed originating from the new Test Cloud integration feature, I believe uninstalling the Test Cloud integration (see Bug 29680, Comment 2) will stop these error messages.
If any 1 person who's seeing this error would like to verify that that partial workaround is successful, that would be perfect. Thanks!
I can verify that the partial workaround from Brendan was successful for me. It removed the Test Cloud integration and I stopped receiving the errors.
Same here: creating a new Xamarin project from Visual Studio (2013 sp4) on Windows 8.1 causes the error.
Solved by deleting testcloud references as describe in Bug 29680.
I confirm the workaround caused the error to stop showing for me.
I dont have a reference to Test Cloud integration. also this is affecting every solution i have not just xamarin projects. I can not build so this is affecting my job.
I rolled back to a previous version of xamarin and the error went away, but now all of my nuget references are broken and nothing builds in visual studio. i reinstalled visual studio and 're-got' all of my code from source control and they still do not build.
Currently i have the lastest version of Xamarin again - error has come back, but i dont know how to disable test cloud.
I can confirm too that the workaround (delete 2 TestCloud files, re-run devenv setup is working to remove the error
I ended up rebuilding my machine. fresh install on windows 8.1 and now I don't have that issue.
Hello, I also get exactly that message on the "Test Cloud" output, although I am not using Test Cloud at all. I am pretty sure that the error message and problem is related to the Components that I have included my project which are
Android Support Library v7 AppCompat
Android Support Library v7 CardView
After loading the solution the latter is actually shown as
Android Support Library v7 CardView (Error)
Opening the component by clicking on it shows exactly the same message at the top. I uploaded a screenshot for your convenience at
Surprisingly the project just builds and runs, so it doesn't seem to be a real problem. Hope this helps to find and fix the bug.
I still get this error after beta update to 3.11.584.
I am still having an issue with this. Now the Test Cloud output window is is giving the error: "ERROR: Object reference not set to an instance of an object." This is now causing a BUILD ERROR for my ios project.
Xamarin VS 3.11.666.0
Created attachment 11912 [details]
Test cloud output window.
I have checked this issue with C7 build XVS 22.214.171.1240 +X.UITest 1.3.8 and able to upload app successfully to TestCloud.
I am not observing any error in Output of TestCloud.
For now I am closing this issue.Please feel free to reopen this issue if you are getting this again in future.
Screencast : http://www.screencast.com/t/lw6m0uGMH
Environment Info: https://gist.github.com/Nischalk/75dd14178f442ded4d0f431bc01af24a