Hi

I am having a problem with a Pachube feed in Processing being disrupted as a result  of a call to the Arduino.

The Arduino works fine independendently of the Pachube feed and the Pachube feed is fine independently of the Arduino. When I uncomment the statements within the if () blocks below the call to the Arduino seems to disconnect the Pachube feed and I get the following error:

############################################
Problem running DataIn...
java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.jav
a:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at eeml.DataIn.run(DataIn.java:260)
     at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
     at pachubeCollectDataUseData2.onReceiveEEML(pachubeCollectDataUseData2.java:66)
     ... 6 more

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##CODE######################################
import eeml.*;
import processing.serial.*;
import cc.arduino.*;        

float  data;
DataIn dIn;
Arduino arduino;
int ledPin10 =  10;
int ledPin11 =  11;
int ledPin12 = 12;
int average;


void setup(){
// set up DataIn object; indicate the URL you want, your Pachube API key, and how often you want it to update e.g. every 5 seconds

     dIn = new DataIn(this,"somePachubeFeedXML","MY_PACHUBE_KEY_HERE", 5000);
   
//print("this is the list of arduinos: ");
   //println(Arduino.list());
 arduino = new Arduino(this, Arduino.list()[0], 57600);
 arduino.pinMode(ledPin10, Arduino.OUTPUT);
 arduino.pinMode(ledPin11, Arduino.OUTPUT);
 arduino.pinMode(ledPin12, Arduino.OUTPUT);
}

void draw()
{
   // do whatever needs doing in the main loop
   
}

// onReceiveEEML is run every time your app receives back EEML that it has requested from a Pachube feed.
void onReceiveEEML(DataIn d){

   float myVariable = d.getValue(1); // get the value of the stream 1
    data = myVariable;
    int average = (int) myVariable;
println(average);

    if (average < 265) {
     //arduino.digitalWrite(ledPin10, Arduino.LOW); //problem emerges if this is called.
     //arduino.analogWrite (ledPin11, Arduino.LOW); //problem emerges if this is called.
     //arduino.analogWrite (ledPin12, Arduino.LOW); //problem emerges if this is called.
    }
   
    if (average > 265){
    // arduino.digitalWrite(ledPin10, Arduino.HIGH); //problem emerges if this is called.
     //arduino.digitalWrite(ledPin11, Arduino.HIGH); //problem emerges if this is called.
     //arduino.digitalWrite(ledPin12, Arduino.HIGH); //problem emerges if this is called.
    }

}

########################################

Any ideas would be much appreciated.
Thanks