在用PlanAhead进行操作的时候改变打开网表列表就会出现如下错误点开细节之后错误提示如下：

# Current time: 17-4-29 15:19:36
# Process ID: 7476
# Platform: Windows
#
# This report is an indication that an internal PlanAhead error occurred.
# This information is useful for debugging. Please open a case with Xilinx
# Technical Support with this file and a testcase attached.
#-------------------------------------------------------------------------------
java.lang.NullPointerException
 at ui.dlg.pr.bd.j(SourceFile:82)
 at ui.dlg.pr.bd.av(SourceFile:71)
 at ui.utils.jide.Y.dq(SourceFile:135)
 at com.jidesoft.grid.hP.getValueAt(SourceFile:523)
 at com.jidesoft.grid.hB.getValueAt(SourceFile:128)
 at com.jidesoft.grid.gl.getValueAt(SourceFile:110)
 at com.jidesoft.grid.hB.getValueAt(SourceFile:128)
 at com.jidesoft.grid.gl.getValueAt(SourceFile:110)
 at javax.swing.JTable.getValueAt(JTable.java:2695)
 at com.jidesoft.grid.fR.getValueAt(SourceFile:516)
 at javax.swing.JTable.prepareRenderer(JTable.java:5712)
 at com.jidesoft.grid.fq.prepareRenderer(SourceFile:3053)
 at com.jidesoft.grid.iO.prepareRenderer(SourceFile:172)
 at ui.utils.jide.i.prepareRenderer(SourceFile:221)
 at ui.utils.jide.ar.b(SourceFile:241)
 at ui.utils.jide.ar.w(SourceFile:222)
 at ui.utils.jide.ar.m(SourceFile:174)
 at ui.utils.jide.ar.k(SourceFile:135)
 at ui.utils.jide.ar.a(SourceFile:100)
 at ui.utils.jide.i.a(SourceFile:391)
 at ui.dlg.common.bs.ao(SourceFile:33)
 at ui.dlg.pr.y.lr(SourceFile:98)
 at ui.dlg.pr.J.aL(SourceFile:86)
 at ui.dlg.pr.J.<init>(SourceFile:56)
 at ui.views.aJ.bwv(SourceFile:657)
 at ui.views.aJ.Iu(SourceFile:311)
 at ui.views.ab.Iu(SourceFile:109)
 at ui.T.<init>(SourceFile:63)
 at ui.views.aJ.<init>(SourceFile:74)
 at ui.views.ab.<init>(SourceFile:80)
 at ui.views.task.s.c(SourceFile:132)
 at ui.views.task.s.b(SourceFile:109)
 at ui.views.task.s.e(SourceFile:295)
 at ui.views.task.U.a(SourceFile:255)
 at ui.frmwork.aD.e(SourceFile:35)
 at ui.frmwork.HTclEventBroker.a(SourceFile:168)
 at ui.frmwork.am.run(SourceFile:222)
 at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
 at ui.frmwork.Y.dispatchEvent(SourceFile:73)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
 at java.awt.Dialog$1.run(Dialog.java:1045)
 at java.awt.Dialog$3.run(Dialog.java:1097)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.awt.Dialog.show(Dialog.java:1095)
 at java.awt.Component.show(Component.java:1563)
 at java.awt.Component.setVisible(Component.java:1515)
 at java.awt.Window.setVisible(Window.java:841)
 at java.awt.Dialog.setVisible(Dialog.java:985)
 at ui.dlg.common.ai.iv(SourceFile:471)
 at ui.dlg.common.ag.actionPerformed(SourceFile:483)
 at ui.dlg.common.ai.aFg(SourceFile:312)
 at ui.views.task.s.Pn(SourceFile:278)
 at ui.views.task.s.Gv(SourceFile:71)
 at ui.views.task.Q.k(SourceFile:784)
 at ui.views.cmdhandler.cD.run(SourceFile:95)
 at ui.frmwork.O.aHQ(SourceFile:51)
 at ui.views.task.t.e(SourceFile:878)
 at ui.views.task.t.a(SourceFile:186)
 at ui.views.task.an.actionPerformed(SourceFile:337)
 at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
 at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
 at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
 at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
 at com.jidesoft.plaf.basic.BasicJideSplitButtonUI$MouseInputHandler.b(SourceFile:778)
 at com.jidesoft.plaf.basic.BasicJideSplitButtonUI$MouseInputHandler.mouseReleased(SourceFile:766)
 at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
 at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
 at java.awt.Component.processMouseEvent(Component.java:6263)
 at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
 at java.awt.Component.processEvent(Component.java:6028)
 at java.awt.Container.processEvent(Container.java:2041)
 at java.awt.Component.dispatchEventImpl(Component.java:4630)
 at java.awt.Container.dispatchEventImpl(Container.java:2099)
 at java.awt.Component.dispatchEvent(Component.java:4460)
 at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
 at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
 at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
 at java.awt.Container.dispatchEventImpl(Container.java:2085)
 at java.awt.Window.dispatchEventImpl(Window.java:2475)
 at java.awt.Component.dispatchEvent(Component.java:4460)
 at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
 at ui.frmwork.Y.dispatchEvent(SourceFile:73)
 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
 at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

不知道有没有人知道该如何对这个进行修复？如果知道还请告知，麻烦了！

关键词：PlanAhead异常