In some rare cases serviio will fails to start on Snow leopard OSx with one of the following errors.

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)

or

"Cannot launch Java application

Uncaught exception in main method:
java.lang.AbstractMethodError:
org.apache.xerces.dom.DeferredAttrNSImpl.getTextContent()Ljava/lang/String;"

this can easily be solved by deleting the follow file.

xerces.jar

located in the

user.home/Library/Java/Extensions/