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NullpointerException when started over Java WebStart

0 votes
I want to start yed over the webstart http://www.yworks.com/products/yed/demo/yed.jnlp. When I launch the jnlp file the application seems to load, but then I get a NullpointerException and the webstart stops.

    at java.util.zip.ZipFile.<init>(Unknown Source)
    at java.util.zip.ZipFile.<init>(Unknown Source)
    at java.util.jar.JarFile.<init>(Unknown Source)
    at java.util.jar.JarFile.<init>(Unknown Source)
    at com.sun.javaws.LaunchDownload.getMainClassName(Unknown Source)
    at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
    at com.sun.javaws.Launcher.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Whats wrong here?
in Help by

1 Answer

0 votes
It is difficult to tell what went wrong. In any case, this is a Web Start problem, not a yEd problem. Maybe Web Start was not able to download the yEd application. (E.g. because your firewall is blocking the download.) Or maybe an over-zealous anti-virus software deleted the yEd application right after download and before Web Start could run yEd.

The best advice I can offer is to update your Web Start installation to the latest version (8u5 as of this writing) and try again. If that does not help, install yEd locally.
by [yWorks] (151k points)
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