m文件打开时，系统提示找不到指定的路径 然后窗口报错

zhong124

在命令窗口显示如下语句，是什么意思啊？

[ConditionalEventPump] Exception occurred during event dispatching:
java.lang.NullPointerException
        at java.io.File.<init>(Unknown Source)
        at com.mathworks.jmi.MatlabPath.getValidPathEntryParent(MatlabPath.java:760)
        at com.mathworks.mlwidgets.dialog.PathChange.handleReply(PathChange.java:244)
        at com.mathworks.mlwidgets.dialog.PathChange.showChangePathDialog(PathChange.java:237)
        at com.mathworks.mlwidgets.dialog.PathChange.dispatchAction(PathChange.java:182)
        at com.mathworks.mlwidgets.dialog.PathChange.access$000(PathChange.java:35)
        at com.mathworks.mlwidgets.dialog.PathChange$1$1.run(PathChange.java:146)
        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)

希望得到大家的帮助，在这里先谢谢大家了！