java.lang.IllegalArgumentException: illegal component position
	at java.awt.Container.addImpl(Container.java:999)
	at java.awt.Container.add(Container.java:390)
	at org.netbeans.modules.form.layoutsupport.AbstractLayoutSupport.addComponentsToContainer(AbstractLayoutSupport.java:544)
	at org.netbeans.modules.form.layoutsupport.LayoutSupportManager.addComponentsToContainer(LayoutSupportManager.java:589)
	at org.netbeans.modules.form.VisualReplicator.addComponent(VisualReplicator.java:259)
	at org.netbeans.modules.form.VisualReplicator.updateAddedComponents(VisualReplicator.java:228)
	at org.netbeans.modules.form.FormDesigner$FormListener.performUpdates(FormDesigner.java:992)
	at org.netbeans.modules.form.FormDesigner$FormListener.run(FormDesigner.java:946)
	at org.netbeans.modules.form.FormLAF$2.run(FormLAF.java:93)
	at org.openide.util.Mutex.doEventAccess(Mutex.java:1044)
	at org.openide.util.Mutex.readAccess(Mutex.java:170)
	at org.netbeans.modules.form.FormLAF.executeWithLookAndFeel(FormLAF.java:75)
	at org.netbeans.modules.form.FormDesigner$FormListener.processEvents(FormDesigner.java:940)
	at org.netbeans.modules.form.FormDesigner$FormListener.formChanged(FormDesigner.java:914)
	at org.netbeans.modules.form.FormModel.fireEvents(FormModel.java:816)
[catch] at org.netbeans.modules.form.FormModel$EventBroker.run(FormModel.java:918)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)