test.gpx not read

[ultrawebb]

Hi, I'm new to processing and I want to work with GPS data collected via Arduino. I thought I'd mess with the Processing program first, but I'm getting this error message, which I believe means I need to declare something in the code. I'm using Processing 2, but wanted to run some tests with workable code before I start figuring out what to draw with the code. Can you direct me towards a forum that might help with problem solving this?

Thanks,

Tara

---

test.gpx does not exist or could not be read
java.lang.NullPointerException
at processing.data.XML$1.read(XML.java:190)
at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1753)
at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.arrangeCapacity(XMLEntityScanner.java:1629)
at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.skipString(XMLEntityScanner.java:1667)
at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:196)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:812)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:347)
at processing.data.XML.(XML.java:187)
at processing.core.PApplet.loadXML(PApplet.java:6322)
at processing.core.PApplet.loadXML(PApplet.java:6312)
at tomc.gpx.GPX.parse(GPX.java:62)
at sketch_140820a.setup(sketch_140820a.java:28)
at processing.core.PApplet.handleDraw(PApplet.java:2361)
at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:240)
at processing.core.PApplet.run(PApplet.java:2256)
at java.lang.Thread.run(Thread.java:745)
java.lang.NullPointerException
at tomc.gpx.GPX.parse(GPX.java:63)
at sketch_140820a.setup(sketch_140820a.java:28)
at processing.core.PApplet.handleDraw(PApplet.java:2361)
at processing.core.PGraphicsJava2D.requestDraw(PGraphicsJava2D.java:240)
at processing.core.PApplet.run(PApplet.java:2256)
at java.lang.Thread.run(Thread.java:745)