error inside Serial.<init>()

//import Serial communication library
import processing.serial.*;

//init variables
Serial commPort;
float tempC;
float tempF;
int yDist;
PFont font12;
PFont font24;
float tempHistory = new float[100];

void setup()
{
//setup fonts for use throughout the application
//font12 = loadFont(“Verdana-12.vlw”);
//font24 = loadFont(“Verdana-24.vlw”);

//set the size of the window
size(210, 200);

//init serial communication port
commPort = new Serial(this, “COM1”, 9600);

//fill tempHistory with default temps
for(int index = 0; index<100; index++)
tempHistory[index] = 0;
}

void draw()
{
//get the temp from the serial port
while (commPort.available() > 0)
{
tempC = commPort.read();

//refresh the background to clear old data
background(123);

//draw the temp rectangle
colorMode(RGB, 160); //use color mode sized for fading
stroke (0);
rect (49,19,22,162);
//fade red and blue within the rectangle
for (int colorIndex = 0; colorIndex <= 160; colorIndex++)
{
stroke(160 - colorIndex, 0, colorIndex);
line(50, colorIndex + 20, 70, colorIndex + 20);
}

//draw graph
stroke(0);
fill(255,255,255);
rect(90,80,100,100);
for (int index = 0; index<100; index++)
{
if(index == 99)
tempHistory[index] = tempC;
else
tempHistory[index] = tempHistory[index + 1];
point(90 + index, 180 - tempHistory[index]);
}

//write reference values
fill(0,0,0);
textFont(font12);
textAlign(RIGHT);
text(“212 F”, 45, 25);
text(“32 F”, 45, 187);

//draw triangle pointer
yDist = int(160 - (160 * (tempC * 0.01)));
stroke(0);
triangle(75, yDist + 20, 85, yDist + 15, 85, yDist + 25);

//write the temp in C and F
fill(0,0,0);
textFont(font24);
textAlign(LEFT);
text(str(int(tempC)) + " C", 115, 37);
tempF = ((tempC*9)/5) + 32;
text(str(int(tempF)) + " F", 115, 65);
}
}

am feeding the output values of sensor using simulator for arduino software…now when ever am giving the same port number to both the applications am getting the error!

now when ever am giving the same port number to both the applications am getting the error!

In the history of the universe, there has been more than one error. You are not getting "the error". You are getting an error, but you haven't told us that there error is.

am feeding the output values of sensor using simulator for arduino software.

So, you are not using an Arduino at all? Why are you here, then?

In the history of the universe, there has been more than one error. You are not getting “the error”. You are getting an error, but you haven’t told us that there error is.

You make me laugh most of the times… XD

Your code.

while (commPort.available() > 0)
{
tempC = commPort.read();
// and a million things here inside the while loop?
}

//maybe better

if (commPort.available() > 0)
{
tempC = commPort.read();
commPort.clear(); //let’s clear the Port after reading the value.
}

or

while(commPort.available()<1)
{}
tempC = commPort.read();
commPort.clear();

This is probably not the source of your error; which by the way like Paul mentioned we don’t know what it is. Maybe just another way to write the code.