What release of GlassFish are you using? What exact version of Java are you
running? There is some problem as Java Web Start's class loader tries to
locate a resource in one of the JARs. Unfortunately the error message does
not tell which JAR has the problem. You could try to clear the Java Web Start
cache of your app and all the GlassFish system files. When you relaunch your
app Java Web Start will have to download all the GlassFish system files
again, which as you know takes some time, but if the app works then it will
be worth it. To clear the cache, run javaws -viewer Things are a little
different from one OS to the next, but you should be able to see a window
listing all the downloaded applications. (There will be a drop-list near the
upper left that will say Applications.) Find the entry in the list for your
app, select it, then click the red X (to delete it). Then change the
drop-list to Resources. You can sort by the URL list, and select all the
GlassFish files and click the red X. Then try launching your app again. - Tim
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