ESP-12E [ERASED] error

Hi,

I've been flashing ESP's for ages with Espruino and this is the first time I've seen this.

I've got a really simple bit of code:

function main() {
 var BTN = 12;
 
  var rgb = new Uint8ClampedArray(3*3);
  var pos = 0;
  function getPattern() {
    pos++;
    for (var i=0;i<rgb.length;) {
      rgb[i++] = (1 + Math.sin((i+pos)*0.1324)) * 127;
      rgb[i++] = (1 + Math.sin((i+pos)*0.1654)) * 127;
      rgb[i++] = (1 + Math.sin((i+pos)*0.1)) * 127;
    }
    return rgb;
  }
  setInterval(function() {
    require("neopixel").write(14, getPattern());
  }, 100);

pinMode(12, 'input_pullup');
  setWatch(function(e) {
    console.log('bttn pressed');
  }, 12, { repeat: true, debounce:100, edge: 'falling' });
}

E.on('init', main);

Just to flash some LED's and listen to a button press, and if I type save in the console to store the code, I just get an endless loop of errors reading this:

[ERASED]
in function called from system
Uncaught SyntaxError: Got [ERASED] expected EOF
at line 1 col 1

I'm sure I'm flashing the correct firmware (the V2.08 4mb ESP8266 version)

Any ideas?

Thanks,

Rob