Unable to call scalar function

[mmisnerms]

I am attempting to use a scalar function in a LINQ to entities query.

The tt file is generating an instance method and when I attempt to use it throws the "Don't call this directly. Use LINQ to call the scalar valued function as part of your query" exception.
var a = from s in db.Users where s.LastName == "lastname"
select new {
email = s.Email,
number = db.is4_fnScalarValue2(1)
};

I changed the method to static and removed from the interface and it is working now.

var a = from s in db.Users where s.LastName == "lastname"
select new {
email = s.Email,
number = ApplicationDbContext.is4_fnScalarValue2(1)
};