How can I resolve this error: Loading the include file 'EF.Utility.CS.ttinclude' returned a null or empty string

Question

How can I resolve these errors:

1. Loading the include file \'EF.Utility.CS.ttinclude\' returned a null or empty string.
2. Value does not fall within the

Answer 1

Had this issue with a recent install of VS2017 Enterprise after already having this functionality working in Professional.
The solution for me was to:

1. Open the Visual Studio Installer program and "Modify" my Enterprise installation.
2. Select "ASP.NET and web development" under the Web & Cloud section
3. Click "Modify" in bottom right

It's probably worth noting that I already had EF6 installed and did not need to re-install it to get this to work.

After completing those steps and firing up Visual Studio, the error went away and I was able to generate my classes successfully. Hope this helps!