After Update TeamCity to Version 6.5.5 (build 18087), the Duplicate finder stopted work. So looking for some answer I found in this link - YouTrack from jetbrains one patch to fix it.
After fix it I have had the same original probleme from this question.
"File not found: "../../../../createTagBuild/createTagBuild/SQLScript.cs"
So I decided to try some workaround, and I found the solution.
In my Build Step Configuration at "Version Control Settings", in the Checkout Settings group, the option Checkout Directory is empty, so I decided set the same PATH from build Step that is responsable from the Checkout/Update.
After I set the path the follow msg is displayed:
The following build configurations have the same checkout directory but different VCS settings, this may lead to unnecessary clean checkout on agent:
So I just ignore because the option VCS checkout Model is "Do not checkout files automatically"
Now is working correctly !!!