Arduino-Processing Problem

So, I’m using a book on AR and it explains how to connect Arduino to Processing in order to make an AR application that involves a pressure sensor. However, when I ran the processing code through I got an error on “cam.play();” saying that the function play() does not exist. If I remove this line, the program runs but immediately crashes and produces an error saying “Error inside Serial.0.” This has baffled me for the past few hours. Can someone please figure this out. I need this for a project that’s due soon.

Here’s my Arduino code. This works

void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println(analogRead(A0));
}

Here’s my processing code. This has a problem.

import codeanticode.gsvideo.;
import jp.nyatla.nyar4psg.
;
import processing.serial.*;

Serial myPort;
GSCapture cam;
NyARMultiBoard nya;
PFont font;

String inString = null;
float low = 3.0;
float high = 32.0;
float weight;

void setup() {
size(640,480,P3D);
println(Serial.list());
myPort = new Serial(this, Serial.list()[1], 9600);
myPort.bufferUntil(’\n’);
font = loadFont(“crystal-lightning-64.vlw”);
cam=new GSCapture(this,width,height);
cam.play();

String patts = {“scale16.pat”};
double widths = {80};
nya=new NyARMultiBoard(this, width, height, “camera_para.dat”, patts, widths);
print(nya.VERSION);
nya.gsThreshold=120;
nya.cfThreshold=0.4;
}

void draw(){

if (cam.available() !=true) {
return;
}
cam.read();
hint(DISABLE_DEPTH_TEST);
image(cam,0,0);
hint(ENABLE_DEPTH_TEST);
if(nya.detect(cam)){
if (nya.markers[0].detected){
nya.markers[0].beginTransform();
textFont(font,25.0);
textAlign(CENTER);
fill(50,255,0);
translate(0,50,80);
rotateX(radians(180));
rotateX(radians(90));
text(weight,0,0,0);
nya.markers[0].endTransform();
}
}
}
void serialEvent (Serial myPort) {
inString = myPort.readStringUntil(’\n’);
if (inString != null) {
inString = trim(inString);
float val = float(inString);
weight = 100+((val-low)*(100/(high-low)));
}
}

println(Serial.list());
myPort = new Serial(this, Serial.list()[1], 9600);

The first line lists the serial ports that are available. Is your Arduino really at the second item in the list?