Exception in thread "main" java.lang.AbstractMethodError: org.apache.xerces.dom.DeferredElementImpl.getTextContent()Ljava/lang/String; at artx.objects.AxParameterManager.<init>(AxParameterManager.java:69) at alkwarel.objects.AkArtspace.<init>(AkArtspace.java:96) at alkwarel.gui.AkMainFrame.GetMainPanel(AkMainFrame.java:118) at alkwarel.gui.AkMainFrame.<init>(AkMainFrame.java:87) at alkwarel.Alkwarel.main(Alkwarel.java:103)

One idea is that the version of java/xerces used is not correct

Possible workaround :

We removed an old xerces.jar located in the user.home/Library/Java/Extensions/ folder and it is working now.

found at http://lists.apple.com/archives/java-dev/2008/Oct/msg00002.html