请问打开meteoinfo时出现这样的提醒是什么意思？

sisily

刚开始学习meteoinfo的使用，昨天做了一张聚类分析的图还是好好的，今天想继续分析就发现无法打开，并出现了以下的提醒java.lang.NullPointerException
        at org.meteoinfo.desktop.forms.FrmMain.loadForm(FrmMain.java:1740)
        at org.meteoinfo.desktop.forms.FrmMain.<init>(FrmMain.java:308)
        at org.meteoinfo.desktop.forms.Program$2.run(Program.java:304)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
        at java.awt.EventQueue.access$500(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.awt.EventQueue$3.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(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)



想请教一下王老师和各位，这是什么原因，我应该怎么解决？谢谢