java.lang.AssertionError
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.intervalRemoved(LayoutDesigner.java:3816)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.layoutChanged(LayoutDesigner.java:2231)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.access$100(LayoutDesigner.java:57)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner$Listener.layoutChanged(LayoutDesigner.java:2197)
	at org.netbeans.modules.form.layoutdesign.LayoutModel.fireEvent(LayoutModel.java:805)
	at org.netbeans.modules.form.layoutdesign.LayoutModel.removeInterval(LayoutModel.java:340)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.intervalRemoved(LayoutDesigner.java:3826)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.layoutChanged(LayoutDesigner.java:2231)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.access$100(LayoutDesigner.java:57)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner$Listener.layoutChanged(LayoutDesigner.java:2197)
	at org.netbeans.modules.form.layoutdesign.LayoutModel.fireEvent(LayoutModel.java:805)
	at org.netbeans.modules.form.layoutdesign.LayoutModel.removeInterval(LayoutModel.java:340)
	at org.netbeans.modules.form.layoutdesign.LayoutModel.removeComponentAndIntervals(LayoutModel.java:287)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.addComponents(LayoutDesigner.java:794)
	at org.netbeans.modules.form.layoutdesign.LayoutDesigner.endMoving(LayoutDesigner.java:750)
	at org.netbeans.modules.form.HandleLayer$ExistingComponentDrag.end(HandleLayer.java:2369)
	at org.netbeans.modules.form.HandleLayer$ComponentDrag.end(HandleLayer.java:2145)
	at org.netbeans.modules.form.HandleLayer.endDragging(HandleLayer.java:938)
	at org.netbeans.modules.form.HandleLayer.mouseReleased(HandleLayer.java:1494)
	at java.awt.Component.processMouseEvent(Component.java:6041)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
	at java.awt.Component.processEvent(Component.java:5806)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4413)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4243)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
	at java.awt.Container.dispatchEventImpl(Container.java:2102)
	at java.awt.Window.dispatchEventImpl(Window.java:2440)
	at java.awt.Component.dispatchEvent(Component.java:4243)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)