当我试着扩展节点的等级名称空间视图opctool, opctool挂。为什么?

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看门人尤里我2013年11月7日

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这位Frage祖茂堂Direkter链接

https://de.mathworks.com/matlabcentral/answers/105277-when-i-try-to-expand-the-node-in-the-hierarchical-namespace-view-of-the-opctool-opctool-is-hanged

Beantwortet: pengze朱我2020年6月8日

注:我试着执行本教程 //www.tatmou.com/help/opc/ug/example-basic-opc-toolbox-acquisition-procedure-using-the-opc-tool-gui.html 错误出现在matlab命令窗口后,当opctool挂:

异常的线程AWT-EventQueue-0 . lang。NullPointerException com.mathworks.toolbox.opc.ServerNamespaceClient.addNodesToTree (ServerNamespaceClient.java: 904)在com.mathworks.toolbox.opc.ServerNamespaceClient.updateSNSTree (ServerNamespaceClient.java: 990) com.mathworks.toolbox.opc.ServerNamespaceClient.updateGuiSNSFn (ServerNamespaceClient.java: 998) com.mathworks.toolbox.opc.ServerNamespaceClient.access 200美元(ServerNamespaceClient.java: 25)在com.mathworks.toolbox.opc.ServerNamespaceClient Guisnsfn.matlabEvent (ServerNamespaceClient.java: 1271)美元com.mathworks.jmi.MatlabMCR AWTReplyEvent.run java.awt.event.InvocationEvent (MatlabMCR.java: 1675)。调度在java.awt.EventQueue(未知来源)。在java.awt.EventQueue dispatchEventImpl(未知来源)。访问200美元(未知源)java.awt.EventQueue 3.美元3.美元(未知源)在java.awt.EventQueue跑在java.security.AccessController(未知来源)。doPrivileged(本机方法)java.security.ProtectionDomain 1美元。在java.awt.EventQueue doIntersectionPrivilege(未知来源)。在java.awt.EventDispatchThread dispatchEvent(未知来源)。在java.awt.EventDispatchThread pumpOneEventForFilters(未知来源)。在java.awt.EventDispatchThread pumpEventsForFilter(未知来源)。在java.awt.EventDispatchThread pumpEventsForHierarchy(未知来源)。在java.awt.EventDispatchThread pumpEvents(未知来源)。pumpEvents(未知源)java.awt.EventDispatchThread.run(未知来源)