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

For VS2017, I ended up adding EF6.Utility.CS.ttinclude to model's folder. This resolved my issue with MySql and EF.

File can be found: C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\Extensions\Microsoft\Entity Framework Tools\Templates\Includes\EF6.Utility.CS.ttinclude

UPDATE To avoid doing the above, removing the entities completely then adding back in fixed the issue.