I'm trying to get started with a simple tool for processing.  I found the example below in the wiki and put it in eclipse.  I exported it as a jar and put it in processing\tools\mytool\tool\mytool.jar.  Now processing stalls on startup and eventually reports a launch4j error.  The code seems straightforward enough but I don't know enough about creating jars or runnable jars.  Am I doing something obviously wrong?