Hi again,

I am trying to get a Rita library example working and am getting this error message:

Exception in thread "Animation Thread" java.lang.IllegalStateException: [ERROR] Undefined grammar token: '<start>' in haiku.g.rtf

I have downloaded the Rita library from here:
http://www.rednoise.org/rita/

I have also created an RTF file in my data folder called:
"haiku.g.rtf"

It seems to be correct in terms of the library documentation (here):
http://www.rednoise.org/rita/documentation/rigrammar_class_rigrammar.htm

But for some reason I can not get it to work. Is it something really obvious? My apologies if it is!

the code is here. Thank you:
Code:

import rita.*;

RiText[] rts;
RiGrammar grammar;

void setup()
{
  size(650, 200);
  rts = new RiText[3];
  RiText.setDefaultAlignment(CENTER);
  RiText.setDefaultFont("Helvetica-48.vlw");
  rts[0] = new RiText(this, "click to", width/2, 85);
  rts[1] = new RiText(this, "generate", width/2, 110);
  rts[2] = new RiText(this, "a haiku",  width/2, 135);
  grammar = new RiGrammar(this, "haiku.g.rtf");
}

void draw()
{
  background(100);
}

void mouseClicked()
{    
  String result = grammar.expand();
  String[] lines = result.split("%");
  for (int i = 0; i < rts.length; i++) {
    rts[i].fadeToText(lines[i].trim(), 1.0f);
  }
}