I am trying to set up continuous integration of .sqlproj SSDT projects on our windows server 2016 server.

In order to do this I have installed VS2017 and SSDT tools onto the server to get the required tools. I have also installed MS build tools 2017.

The issue I am currently having is regarding what looks to be miss-matched versions of installed ms build tools and ssdt.

The command i am using to run the build is as follows:

`C:\\Windows\Microsoft.NET\\Framework64\\v4.0.30319\\MSBuild.exe /p:VisualStudioVersion=15.0 /property:MSBuildExtensionsPath="C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Professional\\MSBuild\\" /property:VsInstallRoot="C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Professional\\" DPAP-SQL-Slim.sln`

The two switches passed there are to set two environment parameters that the .sqlproj file is expecting to find when run through Visual studio. This is done because MSBuild does not supply them by default.

The error i am currently getting is as follows:

`C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Microsoft\VisualStudio\v15.0\SSDT\Microsoft.Data.Tools.Schema.SqlTasks.targets(477,5): error MSB4062: The "SqlModelResolutionTask" task could not be loaded from the assembly C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Professional\\Common7\IDE\Extensions\Microsoft\SQLDB\Dac\140\Microsoft.Data.Tools.Schema.Tasks.Sql.dll. Could not load file or assembly 'Microsoft.Build.Utilities.Core, Version=15.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask.`

Now, i can see from running the command: `gacutil /l` in the VS2017 command prompt that the apparently installed version of the `Microsoft.Build.Utilities.Core` dll is v14: `Microsoft.Build.Conversion.Core, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL`

Am i missing something key here? It appears that installing build tools 2017 did not in-fact update the GAC and register the correct DLLs.