Launch Error: The Following Required Field Is Missing From the Launch File: JNLP

If you are encountering this Error: Application Error: Unable to launch the application, Launch file Error:The Following Required Field Is Missing From the Launch file: it is obvious that you trying to Launch a Java WebStart application through a JNLP(Java Network Launching Protocol)

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General
The following required field is missing from the launch file:
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Exception
MissingFieldException[ The following required field is missing from the launch file: ]
at com.sun.javaws.jnl.xml.XMLFormat.parse(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.Main.main(Unknown Source)

First, I recommend to Download/Upgrade your Java Run Time Environment Version to the latest available from Oracle Website, Download Latest JRE.Check If you can Launch the Application now.

If you are still unable to Launch the application, I suggest you perform the following steps.

• Click Start-
• Control Panel
• Double click on Java Icon
• You will have the Java Control Panel Opened
• Click On View Button On Temporary Internet Files Section
• This will bring Up the List of Webstart Applications Installed on your machine
• Right Click on Your Webstart Application and Click on Show JNLP file
• Copy the Actual JNLP location from the JNLP window starting at href, http://........... to.jnlp
• Following is the example
• href="http://example.com/example.jnlp">
• 
• Paste the Link in the Internet Explorer and hit Enter, this will try to Launch your webstart application with out the Launch File Error

This should probably parse the JNLP properly and should resolve the issue.

If you are using java earlier versions of Java 7, try upgrading to latest version of Java 7

Alternatively, turn off your pop up blockers, antivirus and try to Launch the application again.

Hope the above information helps, discuss this post using the below comments section.

Thanks

HP Answers