Includes tag fails with error. "Liquid error: Value cannot be null."

[vistaCentreB2]

I have a directory: C:\temp\templates
With the files: test.liquid and _myInclude.liquid

test.liquid has the following:
{% include myInclude %}

and _myInclude.liquid has:
Hello World!

My code looks like this:
string path = @"C:\temp\templates\test.liquid";
string dir = Path.GetDirectoryName(path);
var fs = new LocalFileSystem(dir);
Template.FileSystem = fs;

string templateContents = File.ReadAllText(path);
Template template = Template.Parse(templateContents);

string result = template.Render();  

And from that I get the following error:
Liquid error: Value cannot be null. Parameter name: input
Occurs in LocalFileSystem.cs, FullPath(string), line 40

[petrhaus]

it should be {% include '_myInclude' %}

[vistaCentreB2]

Yes, that works. I was confused by the error message, thanks.

[tgjones]

Thanks for logging this - the error message was "wrong" because we were not properly handling missing / null templates. My latest commit (f6d8431) fixes this, so the error message is clearer.