tfs 2012 failed to run test case: Error calling Initialization method for test class - mtm

Question

Recently we found our integration test failed unexpected with following exception:
We even remeber that we have changed nothing to TFS BDT workflow and test case.
Error exception:
Error calling Initialization method for test class
UITestDemo.UITestDemo01:
Microsoft.VisualStudio.TestTools.UITest.Extension.UITestException: To
run tests that interact with the desktop, you must set up the test
agent to run as an interactive process. For more information, see "How
to: Set Up Your Test Agent to Run Tests That Interact with the
Desktop" (http://go.microsoft.com/fwlink/?LinkId=255012) If you are
running the tests as part of your team build, you must also set up the
build agent to run as an interactive process. For more information,
see "How to: Configure and Run Scheduled Tests After Building Your
Application" (http://go.microsoft.com/fwlink/?LinkId=254735)
Error Stack Trace:
Microsoft.VisualStudio.TestTools.UITesting.Playback.Initialize()
Microsoft.VisualStudio.TestTools.UITesting.CodedUITestExtensionExecution.BeforeTestInitialize(Object
sender, BeforeTestInitializeEventArgs e)
Microsoft.VisualStudio.TestTools.TestTypes.Unit.UnitTestExecution.RaiseBeforeTestInitialize(BeforeTestInitializeEventArgs
args)
Microsoft.VisualStudio.TestTools.TestTypes.Unit.UnitTestExecuter.RunInitializeMethod()
We have no idea how to fix it.

Answer 1

After investigation, we found that test is running by account: "computerName$" on environment, not the specified account in test controller settings.
<?xml version="1.0" encoding="utf-8"?>
<SystemInformation>
<ComputerName>ComputerName</ComputerName>
<UserName>ComputerName$</UserName>
<UserDomainName>WORKGROUP</UserDomainName>
<OSInfo>
<OSName>Microsoft Windows Server 2008 R2 Enterprise </OSName>
<OSVersion>Microsoft Windows NT 6.1.7601 Service Pack 1</OSVersion>
<SystemDirectory>C:\Windows\system32</SystemDirectory>
<SystemLocale>English (United States)</SystemLocale>
<UserLocale>English (United States)</UserLocale>
</OSInfo>
<ProcessorInfo>
<Processor0>
<ProcessorName>Intel(R) Xeon(R) CPU E5-2690 v2 # 3.00GHz</ProcessorName>
<ProcessorFamily>Intel64 Family 6 Model 62 Stepping 4</ProcessorFamily>
<ProcessorSpeed>2999</ProcessorSpeed>
</Processor0>
<Error>NoError</Error>
</ProcessorInfo>
<MemoryInfo>
<TotalPhysicalMemory>4945</TotalPhysicalMemory>
<AvailablePhysicalMemory>1541</AvailablePhysicalMemory>
<MemoryLoad>68</MemoryLoad>
<TotalVirtualMemory>2047</TotalVirtualMemory>
<AvailableVirtualMemory>1432</AvailableVirtualMemory>
<Error>NoError</Error>
</MemoryInfo>
<ScreenInfo>
<ScreenHeight>768</ScreenHeight>
<ScreenWidth>1024</ScreenWidth>
<BitsPerPixel>32</BitsPerPixel>
</ScreenInfo>
<IEInfo>
<IEVersion>11.0.9600.16428</IEVersion>
<Error>NoError</Error>
</IEInfo>
</SystemInformation>
Solution:
We open the using test settings in MTM test settings manager.
And recheck each environment should run test on correct role.
Then retest run pass.