The topic title is the error I got when I made an attempt to use the split method from inside a script. The way I call it is really nothing fancy, it looks like this:
string text="Line 1\nLine 2"; array<string> line=text.split("\n");
AngelScript manual lists it as one of methods supported by strings. It's said to be a version 2.21.0 addition along with substr, findFirst and findLast methods, all of which appear to work correctly as opposed to split.