Error when trying to convert gpx to datalayer

[hjart]

What steps will reproduce the problem?

1. Right-click gpx in layer window and select "convert to datalayer" (in order to prepare gps-trace for upload to OSM gps database)

What is the expected result?

Gpx is converted to data, so I can edit it.

What happens instead?

JOSM gives me multiple errors and eventually hangs.

Please provide any additional information below. Attach a screenshot if possible.

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-05-17 02:32:56 +0200 (Tue, 17 May 2016)
Build-Date:2016-05-17 01:32:14
Revision:10238
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10238 da) Linux openSUSE 13.2 (Harlequin) (x86_64)
Memory Usage: 481 MB / 1328 MB (353 MB allocated, but free)
Java version: 1.8.0_91-b14, Oracle Corporation, OpenJDK 64-Bit Server VM
Dataset consistency test: No problems found

Plugins:
- DirectUpload (32158)
- FastDraw (32158)
- ImproveOsm (64)
- InfoMode (32158)
- Mapillary (32158)
- OSMRecPlugin (32158)
- OpeningHoursEditor (32158)
- SimplifyArea (32158)
- apache-commons (32158)
- apache-http (32158)
- buildings_tools (32158)
- ejml (32158)
- geotools (31895)
- jts (31906)
- log4j (32158)
- rasterfilters (32158)
- reverter (32158)
- tag2link (31923)
- tagging-preset-tester (32158)
- todo (29154)
- utilsplugin2 (32158)
- wikipedia (32158)

Tagging presets:
- ${HOME}/OpenStreetMap/josm-stuff/HjartsPresets.xml
- http://www.country-linedance.de/daten/Archaeologie-de.zip
- http://zibi.openstreetmap.org.pl/kendzi/k/Simple3dPreset/s3db-preset.zip
- https://josm.openstreetmap.de/josmfile?page=Presets/CommonKeyboardShortcuts&zip=1
- https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1
- https://josm.openstreetmap.de/josmfile?page=Presets/Quick-highways&zip=1

Map paint styles:
- https://josm.openstreetmap.de/josmfile?page=Styles/Fixme&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/SimpleBuildingTags&zip=1

Last errors/warnings:
- W: [NODE, CLOSEDWAY] Windmill: Could not get presets icon windmill.png
- W: Cannot start IPv4 remotecontrol https server on port 8112: Keystore was tampered with, or password was incorrect
- W: Cannot start IPv6 remotecontrol https server on port 8112: Keystore was tampered with, or password was incorrect
- E: java.lang.NoClassDefFoundError. Årsag: java.lang.NoClassDefFoundError. Årsag: java.lang.NoClassDefFoundError: Could not initialize class org.openstreetmap.josm.gui.mappaint.styleelement.NodeElement
- E: java.lang.NoClassDefFoundError. Årsag: java.lang.NoClassDefFoundError. Årsag: java.lang.NoClassDefFoundError: Could not initialize class org.openstreetmap.josm.gui.mappaint.styleelement.NodeElement

java.lang.NoClassDefFoundError
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:598)
	at java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:677)
	at java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:720)
	at java.util.concurrent.ForkJoinPool.invoke(ForkJoinPool.java:2616)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer.render(StyledMapRenderer.java:1932)
	at org.openstreetmap.josm.gui.layer.OsmDataLayer.paint(OsmDataLayer.java:402)
	at org.openstreetmap.josm.gui.MapView.paintLayer(MapView.java:689)
	at org.openstreetmap.josm.gui.MapView.paint(MapView.java:773)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JSplitPane.paintChildren(JSplitPane.java:1047)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
	at javax.swing.JComponent.paintChildren(JComponent.java:880)
	at javax.swing.JComponent.paint(JComponent.java:1056)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5201)
	at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1579)
	at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1502)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:306)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5149)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4960)
	at javax.swing.RepaintManager$4.run(RepaintManager.java:831)
	at javax.swing.RepaintManager$4.run(RepaintManager.java:814)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789)
	at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738)
	at javax.swing.RepaintManager.access$1200(RepaintManager.java:64)
	at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.lang.NoClassDefFoundError
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:598)
	at java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:677)
	at java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:720)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer$ComputeStyleListWorker.compute(StyledMapRenderer.java:1831)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer$ComputeStyleListWorker.compute(StyledMapRenderer.java:1795)
	at java.util.concurrent.RecursiveTask.exec(RecursiveTask.java:94)
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
	at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.openstreetmap.josm.gui.mappaint.styleelement.NodeElement
	at org.openstreetmap.josm.gui.mappaint.ElemStyles.generateStyles(ElemStyles.java:360)
	at org.openstreetmap.josm.gui.mappaint.ElemStyles.getImpl(ElemStyles.java:190)
	at org.openstreetmap.josm.gui.mappaint.ElemStyles.getStyleCacheWithRange(ElemStyles.java:104)
	at org.openstreetmap.josm.gui.mappaint.ElemStyles.get(ElemStyles.java:83)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer$ComputeStyleListWorker.add(StyledMapRenderer.java:1872)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer$ComputeStyleListWorker.visit(StyledMapRenderer.java:1853)
	at org.openstreetmap.josm.data.osm.Node.accept(Node.java:214)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer$ComputeStyleListWorker.computeDirectly(StyledMapRenderer.java:1842)
	at org.openstreetmap.josm.data.osm.visitor.paint.StyledMapRenderer$ComputeStyleListWorker.compute(StyledMapRenderer.java:1822)
	... 6 more

[Don-vip]

Closed as duplicate of #12847.