java.lang.NullPointerException

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  • java.lang.NullPointerException at ms_main.MS_Qry.getData(MS_Qry.java:28) at ms_main.MS_Main_Table.ddSerch1ActionPerformed(MS_Main_Table.java:567) at ms_main.MS_Main_Table.access$300(MS_Main_Table.java:12) at ms_main.MS_Main_Table$4.actionPerformed(MS_Main_Table.java:352) at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1260) at javax.swing.JComboBox.contentsChanged(JComboBox.java:1331) at javax.swing.AbstractListModel.fireContentsChanged(AbstractListModel.java:118) at javax.swing.DefaultComboBoxModel.setSelectedItem(DefaultComboBoxModel.java:93) at javax.swing.DefaultComboBoxModel.addElement(DefaultComboBoxModel.java:131) at javax.swing.JComboBox.addItem(JComboBox.java:718) at ms_main.MS_Main_Table.comboLord(MS_Main_Table.java:39) at ms_main.MS_Main_Table.<init>(MS_Main_Table.java:24) at ms_main.MS_Main_Table$6.run(MS_Main_Table.java:602) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:703) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
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