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Whenever we try and run a distributed load test on our TFS test controller, we get the following error message:

The ObjectManager found an invalid number of fixups. this usually indicates a problem in the formatter.

enter image description here

I've created the world's simplest test to ensure it's not a problem with my code:

My test looks like this:

[TestClass] public class UnitTest1 { [TestMethod] public void TestMethod1() { Assert.IsTrue(true); } }

And the load-test configuration looks like this:

enter image description here

Environment

The environment is very simple - 1 TFS server, 1 TFS Test Controller, and 1 TFS Test Agent (on separate servers).

Things I have tried

I have tried recreating the LoadTest2010 database using the instructions here.

I have confirmed that the same test works both locally, and on Visual Studio Online load testing.

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I am not sure if you've found a solution to this yourself but I was having the same problem and have been able to resolve it by doing the following:
1) After you have created the loadtest save and close it.
2) open your loadtest in notepad or notepad++
3) scroll to the bottom and locate LoadGeneratorLocations
4) delete this tag and the content in between the tag. Save and close.
5) open your loadtest in visual studio.

Hope this helps you.

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4 Comments

Amazing! We added the location to run it using Visual Studio Online. Thanks so much!
@RB Maybe your test agents are not VS2013 update 5 or VS2015 while your client is?
@Albert D'oh! That is definitely the case. I'll look into upgrading the test agents :)
Glad I could help. @Albert might have to do the same on my machines.

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