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java.lang.NullPointerException: 	at java.util.Hashtable.get(Hashtable.java:336)	at java.text.NumberFormat.getInstance(NumberFormat.java:663)	at java.text.NumberFormat.getPercentInstance(NumberFormat.java:425)	at org.pentaho.reporting.engine.classic.core.modules.gui.base.PreviewPane.formatZoomText(PreviewPane.java:1455)	at org.pentaho.reporting.engine.classic.core.modules.gui.base.PreviewPane.performInitialization(PreviewPane.java:1223)	at org.pentaho.reporting.engine.classic.core.modules.gui.base.PreviewPane.initializeFromReport(PreviewPane.java:1193)	at org.pentaho.reporting.engine.classic.core.modules.gui.base.PreviewPane.setReportJob(PreviewPane.java:1031)	at org.pentaho.reporting.designer.core.editor.preview.ReportPreviewComponent.updatePreview(ReportPreviewComponent.java:242)	at org.pentaho.reporting.designer.core.editor.ReportRendererComponent.showPreview(ReportRendererComponent.java:466)	at org.pentaho.reporting.designer.core.ReportDesignerFrame$FrameViewController.setPreviewVisible(ReportDesignerFrame.java:722)	at org.pentaho.reporting.designer.core.actions.global.ShowPreviewPaneAction.actionPerformed(ShowPreviewPaneAction.java:73)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231)	at java.awt.Component.processMouseEvent(Component.java:5602)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3135)	at java.awt.Component.processEvent(Component.java:5367)	at java.awt.Container.processEvent(Container.java:2010)	at java.awt.Component.dispatchEventImpl(Component.java:4068)	at java.awt.Container.dispatchEventImpl(Container.java:2068)	at java.awt.Component.dispatchEvent(Component.java:3903)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3936)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)	at java.awt.Container.dispatchEventImpl(Container.java:2054)	at java.awt.Window.dispatchEventImpl(Window.java:1801)	at java.awt.Component.dispatchEvent(Component.java:3903)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)