The following error occur
Validation did not pass!
Exception in thread "Thread-11" java.lang.NullPointerException
at java.util.TreeMap.getEntry(Unknown Source)
at java.util.TreeMap.get(Unknown Source)
at com.izforge.izpack.LocaleDatabase.getString(Unknown Source)
at com.izforge.izpack.installer.IzPanel.validatePanel(Unknown Source)
at com.izforge.izpack.installer.IzPanel.panelValidated(Unknown Source)
at com.izforge.izpack.installer.InstallerFrame.navigateNext(Unknown Source)
at com.izforge.izpack.installer.InstallerFrame.navigateNext(Unknown Source)
at com.izforge.izpack.installer.InstallerFrame$NavigationHandler.navigate(Unknown Source)
at com.izforge.izpack.installer.InstallerFrame$NavigationHandler.access$100(Unknown Source)
at com.izforge.izpack.installer.InstallerFrame$NavigationHandler$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)