When no RXTX: NoClassDefFoundError: CommPortIdentifier

DO NOT EDIT OR ANSWER THIS ISSUE. SEE THE ORIGINAL ISSUE INSTEAD:
https://www.jfire.org/modules/bugs/view.php?id=1047
ORIGINAL REPORTER: abous

When clicking on Key-Reader and no RXTX installed in JRE.

How to solve this? Deploy RXTX with JFire (with KeyReader)? License?

java.lang.NoClassDefFoundError: Could not initialize class gnu.io.CommPortIdentifier

Additional information:

java.lang.NoClassDefFoundError: Could not initialize class gnu.io.CommPortIdentifier
at org.nightlabs.connection.rxtx.config.PortMan.getPortIdentifiers(PortMan.java:53)
at org.nightlabs.connection.rxtx.config.SerialConnectionCf.getSerialPortIdentifiers(SerialConnectionCf.java:57)
at org.nightlabs.connection.ui.serial.SerialConnectionCfEditComposite.load(SerialConnectionCfEditComposite.java:84)
at org.nightlabs.connection.ui.serial.SerialConnectionCfEditComposite.<init>(SerialConnectionCfEditComposite.java:65)
at org.nightlabs.connection.ui.serial.SerialConnectionCfEdit._createConnectionCfEditComposite(SerialConnectionCfEdit.java:12)
at org.nightlabs.connection.ui.AbstractConnectionCfEdit.createConnectionCfEditComposite(AbstractConnectionCfEdit.java:63)
at org.nightlabs.keyreader.ui.preference.KeyReaderPreferenceComposite.connectionCfEdit_create(KeyReaderPreferenceComposite.java:290)
at org.nightlabs.keyreader.ui.preference.KeyReaderPreferenceComposite.connectionImplementationCombo_create(KeyReaderPreferenceComposite.java:222)
at org.nightlabs.keyreader.ui.preference.KeyReaderPreferenceComposite.keyReaderImplementationSelected(KeyReaderPreferenceComposite.java:137)
at org.nightlabs.keyreader.ui.preference.KeyReaderPreferenceComposite.keyReaderUseCaseSelected(KeyReaderPreferenceComposite.java:267)
at org.nightlabs.keyreader.ui.preference.KeyReaderPreferenceComposite.access$000(KeyReaderPreferenceComposite.java:40)
at org.nightlabs.keyreader.ui.preference.KeyReaderPreferenceComposite$2.selectionChanged(KeyReaderPreferenceComposite.java:75)
at org.nightlabs.base.ui.selection.SelectionProvider.fireSelectionChangedEvent(SelectionProvider.java:117)
at org.nightlabs.base.ui.selection.SelectionProvider.setSelection(SelectionProvider.java:104)
at org.nightlabs.base.ui.composite.AbstractListComposite.fireSelectionChangedEvent(AbstractListComposite.java:570)
at org.nightlabs.base.ui.composite.ListComposite$1.widgetSelected(ListComposite.java:140)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
at org.eclipse.jface.window.Window.open(Window.java:796)
at org.eclipse.ui.internal.OpenPreferencesAction.run(OpenPreferencesAction.java:65)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3682)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3293)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2448)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2412)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2278)
at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:466)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:289)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:461)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.nightlabs.base.ui.app.AbstractApplication.start(AbstractApplication.java:347)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:504)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:443)
at org.eclipse.equinox.launcher.Main.run(Main.java:1169)