It looks like Bamboo creates a bat file called devenvrunner.bat and uses this to run build commands.

The problem is that it contains 2 lines:

call "%BAM_VS_HOME%\VC\vcvarsall.bat" %BAM_VS_ARCH%
call "%BAM_VS_HOME%\Common7\IDE\devenv.com" %BAM_ARGS%

The problem with the first line is that vcvarsall.bat does not exist in VS 2015

The problem with the second line is that when the build happens, this expands to:

c:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Common7\IDE\devenv.com

instead of

c:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\\IDE\devenv.com

Here are the errors:

21-Jan-2016 14:28:27 c:\bamboo\build-dir\CXN-CXN13-JOB1>call "c:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\VC\vcvarsall.bat" x86
21-Jan-2016 14:28:27 The system cannot find the path specified.
21-Jan-2016 14:28:27
21-Jan-2016 14:28:27 c:\bamboo\build-dir\CXN-CXN13-JOB1>call "c:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\Common7\IDE\devenv.com" "Connexion.sln" /clean debug

Version: Continuous integration powered by Atlassian Bamboo version 5.10.0 build 51017 - 15 Jan 16