Null Pointer Exception when loading GPX file

[thomas.sprinkmeier@…]

I'd just updated the jar file

$ md5sum /home/sprinkmeier/GPS/josm-latest.jar
d8162eaa209fe97d3b30d6657530496f  /home/sprinkmeier/GPS/josm-latest.jar

and executed it as I normally do:

$java -Xmx512M -jar /home/sprinkmeier/GPS/josm-latest.jar dump.2009.0710.2114.ttyUSB0.gpx

When I got this NPE:

Path: trunk
URL: http://josm.openstreetmap.de/svn/trunk
Repository Root: http://josm.openstreetmap.de/svn
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Revision: 1892
Node Kind: directory
Last Changed Author: Gubaer
Last Changed Rev: 1892
Last Changed Date: 2009-08-03 00:17:45 +0200 (Mon, 03 Aug 2009)


Memory Usage: 18 MB / 508 MB (6 MB allocated, but free)
Java version: 1.6.0_06



java.lang.NullPointerException
	at org.openstreetmap.josm.gui.layer.Layer.setName(Layer.java:172)
	at org.openstreetmap.josm.gui.layer.Layer.<init>(Layer.java:97)
	at org.openstreetmap.josm.gui.layer.GpxLayer.<init>(GpxLayer.java:83)
	at org.openstreetmap.josm.gui.layer.GpxLayer.<init>(GpxLayer.java:95)
	at org.openstreetmap.josm.io.GpxImporter.importData(GpxImporter.java:48)
	at org.openstreetmap.josm.actions.OpenFileAction.openFile(OpenFileAction.java:53)
	at org.openstreetmap.josm.Main.downloadFromParamString(Main.java:462)
	at org.openstreetmap.josm.Main.postConstructorProcessCmdLine(Main.java:365)
	at org.openstreetmap.josm.gui.MainApplication$2.run(MainApplication.java:151)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

Nothing special about the GPX dump file, it opens just fine in -tested (version 1788).

I can start the -latest just file, but I get exactly the same NPE if I try to open the dump file once it's running.

Given that the function that died is setName() I suspected it might be because I have not 'named' my GPX dump properly:

<?xml version="1.0" encoding="UTF-8"?>
<gpx
 version="1.0"
creator="GPSBabel - http://www.gpsbabel.org"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.topografix.com/GPX/1/0"
xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd">
<time>2009-07-10T11:45:21Z</time>
<bounds minlat="-00.3990173" minlon="52.5634766" maxlat="-72.0027924" maxlon="64.8071289"/>
<trk>
  <name>DG-100 tracklog</name>
  <desc>DG-100 GPS tracklog data</desc>
<trkseg>
<trkpt lat="-00.0568390" lon="53.3218384">
  <ele>0.000000</ele>
<time>2009-07-09T22:46:33Z</time>
  <speed>16.833334</speed>
</trkpt>

So I tried 'naming' the data by running it through prune, same NPE:

$ head NPE-TEST.gpx 
<?xml version="1.0" encoding="UTF-8"?>
<gpx version="1.0" creator="Prune v7 activityworkshop.net"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns="http://www.topografix.com/GPX/1/0" xsi:schemaLocation="http://www.topografix.com/GPX/1/0 http://www.topografix.com/GPX/1/0/gpx.xsd">
        <name>TestName</name>
        <desc>TestDescription</desc>
        <trk><name>TestName</name><number>1</number><trkseg>
...

The console reports an additional error:

Uncaught error fetching image:
java.lang.ClassCastException: [I cannot be cast to [B
        at java.awt.image.ColorModel.getAlpha(ColorModel.java:815)
        at java.awt.image.ColorModel.getRGB(ColorModel.java:860)
        at sun.awt.image.ImageRepresentation.convertToRGB(ImageRepresentation.java:283)
        at sun.awt.image.ImageRepresentation.setPixels(ImageRepresentation.java:497)
        at java.awt.image.AreaAveragingScaleFilter.accumPixels(AreaAveragingScaleFilter.java:196)
        at java.awt.image.AreaAveragingScaleFilter.setPixels(AreaAveragingScaleFilter.java:235)
        at sun.awt.image.ImageDecoder.setPixels(ImageDecoder.java:108)
        at sun.awt.image.PNGImageDecoder.sendPixels(PNGImageDecoder.java:540)
        at sun.awt.image.PNGImageDecoder.produceImage(PNGImageDecoder.java:460)
        at sun.awt.image.InputStreamImageSource.doFetch(InputStreamImageSource.java:246)
        at sun.awt.image.ImageFetcher.fetchloop(ImageFetcher.java:172)
        at sun.awt.image.ImageFetcher.run(ImageFetcher.java:136)

Let me know if I can do anything else.

[Gubaer]

There's an annoying bug in r1892. Please upgrade to latest (r1890 or higher).

[anonymous]

Upgraded to 1900, working now.

Sorry if I wasted your time with an old bug, I though I had the latest version.

[Gubaer]

Don't worry, I'm glad you reported it.