MSBUILD Error MSB4025 in TeamCity build step for Visual Studio

I just fixed this.

Look inside the Test.sln file for Project or EndProject tags that aren't closed. For us, the EndProject was missing and it broke on teamcity, but no issues in Visual Studio.

It seems the TeamCity error message will occur for any number of root causes. In my case the problem occurred because a line inside the GlobalSection(NestedProjects) section was referring to a project Guid which didn't relate to any project defined in the Solution file.

As with the previous post I didn't have any issues building in Visual Studio. I only got a more helpful error message that allowed me to discover what the real problem was when I built using msbuild.

See https://therightjoin.wordpress.com/2014/07/04/msb4025-the-project-file-could-not-be-loaded-data-at-the-root-level-is-invalid-error-when-building-ssdt-project-in-teamcity for another example, and where using msbuild helped identify the true problem.