[How to] Fix “JNLPException[category: Launch File Error : Exception: null : LaunchDesc” Error

Sometimes it does happen where the built-in Java Security prevents the java filebot to run. The error message will be “JNLPException[category: Launch File Error : Exception: null : LaunchDesc” and pop-will be as shown below.

Click on the Image above for a larger view

One of the ways to resolve the error is to clean up the Webstart cache. Follow these steps and clean it up.

  • Head out to Control panel, search and select Java. In Windows 7, it will be under Control Panel -> Programs.
  • Select Java.
  • In Java Control Panel, under General Tab, click on View.
  • In Java Cache Viewer, select an item from the list box next to “Show:”
  • Select the cache listed below and hit delete button.
  • Once you clear all the cache from all lists, try re-launching your Java Webstart application. It should work fine now.

Do let us know, if the above tip has helped you.

12 Responses to [How to] Fix “JNLPException[category: Launch File Error : Exception: null : LaunchDesc” Error

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  10. Mike Schwager says:

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