Hi all!!!
I'm a newbie of processing, and i've encountered a big problem. I write a processing sketch, when i export this sketch using "Export Application" (using Shift+cmd+E) from the File menù, i've got this error:


java.lang.NullPointerException
at processing.app.Base.copyDir(Base.java:2111)
at processing.app.Sketch.exportApplication(Sketch.java:2221)
at processing.app.Editor$41.run(Editor.java:1583)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:189)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:478)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:2
34)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:184
)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:178)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:170)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)



Anyone can help me????

Thanks a lot!   (And excuse me for my BAAAD english)!

Thanks a lot for your response!
So, i send all these information to the Processing Bug Report.

For your information, i use Processing 0135 Beta with a macbook with Leopard 10.5.4.
This error come every time i try to export any sketches using Shift+cmd+E.
I put my sketches in one folder located in my Desktop.

This is the code, for any suggestion:




import hypermedia.video.*;

PImage img;
OpenCV opencv;

// contrast/brightness values
int contrast_value    = 0;
int brightness_value  = 0;



void setup() {

 size( 640, 480 );
 PImage a;  // Declare variable "a" of type PImage
 img = loadImage("Max.png"); // Load the images into the program

 opencv = new OpenCV( this );
 opencv.capture( width, height );                   // open video stream
 opencv.cascade( OpenCV.CASCADE_FRONTALFACE_ALT );  // load detection description, here-> front face detection : "haarcascade_frontalface_alt.xml"


 // print usage
 println( "Drag mouse on X-axis inside this sketch window to change contrast" );
 println( "Drag mouse on Y-axis inside this sketch window to change brightness" );

}


public void stop() {
 opencv.stop();
 super.stop();
}



void draw() {

 // grab a new frame
 // and convert to gray
 opencv.read();
 opencv.convert( GRAY );
 opencv.contrast( contrast_value );
 opencv.brightness( brightness_value );

 // proceed detection
 Rectangle[] faces = opencv.detect( 1.2, 2, OpenCV.HAAR_DO_CANNY_PRUNING, 40, 40 );

 // display the image
 image( opencv.image(), 0, 0 );


 // draw face area(s)
 noFill();
 stroke(255,0,0);
 for( int i=0; i<faces.length; i++ ) {
     image(img, faces[i].x+180, faces[i].y-200);
  // image(img, faces[i].width, faces[i].height );
 }
}



/**
* Changes contrast/brigthness values
*/
void mouseDragged() {
 contrast_value   = (int) map( mouseX, 0, width, -128, 128 );
 brightness_value = (int) map( mouseY, 0, width, -128, 128 );
}





Thanks a lot PhiLho!