java.lang.NullPointerException
	at org.netbeans.modules.form.FormDesigner.checkDesignerSize(FormDesigner.java:814)
	at org.netbeans.modules.form.FormDesigner.access$1700(FormDesigner.java:76)
	at org.netbeans.modules.form.FormDesigner$FormListener.run(FormDesigner.java:2256)
	at org.netbeans.modules.form.FormDesigner$FormListener.processEvents(FormDesigner.java:2117)
	at org.netbeans.modules.form.FormDesigner$FormListener.formChanged(FormDesigner.java:2078)
	at org.netbeans.modules.form.FormModel.fireEvents(FormModel.java:985)
[catch] at org.netbeans.modules.form.FormModel$EventBroker.run(FormModel.java:1094)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	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)