Attempted access of inaccessible method for interface function? - actionscript-3

Question

I can't see what is wrong with this. I have a class MyConnectionManager that has this code:
public class MyConnectionManager {
private var _delegate:NetworkConnectionDelegate;
public function myfunc():void
{
this.delegate.onError(1); // compile error here!
}
public function get delegate():NetworkConnectionDelegate
{
return _delegate;
}
etc
}
where NetworkConnectionDelegate is an interface and has a method onError()
public interface NetworkConnectionDelegate {
function onError(x:int):void;
}
But the compiler (Flash Builder) says that onError is an inaccessible method when compiling MyConnectionManager. Why won't it compile?

Answer 1

Interface describes public structure of class instance.
You need to create you class, and then implement it from defined interface.
Like,
Class:
public class NetworkConnectionDelegate implements IError {
...
// implements to IError interface
public function onError(x : int) : void {
..
}
}
Interface:
public interface IError {
function onError(x : int) : void;
}

Answer 2

belive it or not, the above code is perfectly fine. It was a syntax error in a completely different source file that must have freaked out Flas Builer to cause the compiler error. Once i fixed the totally unrelated error, it compiled just fine. This sort of compile error would never have happened in a decent compiler like VV++ or XCode, but FB seems a liitle flakey. oh well.