Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at com.fr.design.gui.filetree.FileTreeIcon.getIcon(Unknown Source) at com.fr.design.gui.filetree.EnvFileTree$1.getTreeCellRendererComponent(Unknown Source) at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsHandler.getNodeDimensions(Unknown Source) at javax.swing.tree.AbstractLayoutCache.getNodeDimensions(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.updatePreferredSize(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache.rebuild(Unknown Source) at javax.swing.tree.VariableHeightLayoutCache.setModel(Unknown Source) at javax.swing.plaf.basic.BasicTreeUI.configureLayoutCache(Unknown Source) at javax.swing.plaf.basic.BasicTreeUI.completeUIInstall(Unknown Source) at javax.swing.plaf.basic.BasicTreeUI.installUI(Unknown Source) at javax.swing.plaf.metal.MetalTreeUI.installUI(Unknown Source) at javax.swing.JComponent.setUI(Unknown Source) at javax.swing.JTree.setUI(Unknown Source) at javax.swing.JTree.updateUI(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI0(Unknown Source) at javax.swing.SwingUtilities.updateComponentTreeUI(Unknown Source) at javax.swing.plaf.metal.MetalLookAndFeel$AATextListener.updateWindowUI(Unknown Source) at javax.swing.plaf.metal.MetalLookAndFeel$AATextListener.updateAllUIs(Unknown Source) at javax.swing.plaf.metal.MetalLookAndFeel$AATextListener.access$200(Unknown Source) at javax.swing.plaf.metal.MetalLookAndFeel$AATextListener$1.run(Unknown Source) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)