I wanted it to the class name to be in the error message if you use a undefined function. So I modified angelscript to do it and now the error message looks like this:

script (1, 1) : INFO : Compiling void main()
script (3, 12) : ERR  : No matching signatures to 'CSystem::Foo()'

I added a extra parameter to MatchFunctions that allows CompileFunctionCall to pass a copy of asCObjectType. You can get the changed code here not sure if you would want to include this into it or not, but I think it gives a little more information about the error. Thanks, Jeremy