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java.lang.NullPointerException: 	at org.openmicroscopy.shoola.agents.dataBrowser.view.RowFieldCanvas$FieldDisplay.getPreferredSize(RowFieldCanvas.java:283)	at java.awt.GridBagLayout.GetLayoutInfo(GridBagLayout.java:1115)	at java.awt.GridBagLayout.getLayoutInfo(GridBagLayout.java:916)	at java.awt.GridBagLayout.preferredLayoutSize(GridBagLayout.java:736)	at java.awt.Container.preferredSize(Container.java:1796)	at java.awt.Container.getPreferredSize(Container.java:1780)	at javax.swing.JComponent.getPreferredSize(JComponent.java:1664)	at javax.swing.ScrollPaneLayout.layoutContainer(ScrollPaneLayout.java:791)	at java.awt.Container.layout(Container.java:1510)	at java.awt.Container.doLayout(Container.java:1499)	at java.awt.Container.validateTree(Container.java:1695)	at java.awt.Container.validateTree(Container.java:1704)	at java.awt.Container.validateTree(Container.java:1704)	at java.awt.Container.validate(Container.java:1630)	at javax.swing.RepaintManager$3.run(RepaintManager.java:711)	at javax.swing.RepaintManager$3.run(RepaintManager.java:709)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at javax.swing.RepaintManager.validateInvalidComponents(RepaintManager.java:708)	at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1731)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)