MATLAB: Can’t use the help docements about matlab2015a

matlab 2015aMATLAB Production Server

Hi, dear, I can't use doc help documents when I use the matlab 2015a on the win7 system, everytime when I use the doc command, the error will happen like this:
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.mlwidgets.help.ProductFilterModel$InstalledState
  Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.mlwidgets.help.ProductFilterModel$InstalledState
    at com.mathworks.mlwidgets.help.DocCenterProductPrefs.getSelectedProductsFromPref(DocCenterProductPrefs.java:47)
    at com.mathworks.mlwidgets.help.DocCenterProductPrefs.getProductFilterModel(DocCenterProductPrefs.java:33)
    at com.mathworks.mlwidgets.help.DocCenterDocConfigParams.<init>(DocCenterDocConfigParams.java:37)
    at com.mathworks.mlwidgets.help.DocCenterDocConfig.getLocalConfig(DocCenterDocConfig.java:77)
    at com.mathworks.mlwidgets.help.DocCenterDocConfig.getInstance(DocCenterDocConfig.java:65)
    at com.mathworks.mlwidgets.help.HelpPopup.createHelpPanel(HelpPopup.java:461)
    at com.mathworks.mlwidgets.help.HelpPopup.createComponents(HelpPopup.java:451)
    at com.mathworks.mlwidgets.help.HelpPopup.<init>(HelpPopup.java:447)
    at com.mathworks.mlwidgets.help.HelpPopup.getInstance(HelpPopup.java:428)
    at com.mathworks.mlwidgets.help.HelpPopup.closeIfShowingWithDifferentParent(HelpPopup.java:273)
    at com.mathworks.mlwidgets.help.HelpPopup.showHelp(HelpPopup.java:386)
    at com.mathworks.mlwidgets.help.HelpPopup.showHelp(HelpPopup.java:347)
    at com.mathworks.mlwidgets.help.HelpPopup.showHelp(HelpPopup.java:210)
    at com.mathworks.mde.editor.plugins.matlab.MatlabSelectionDelegate$2.run(MatlabSelectionDelegate.java:198)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$200(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$1.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)
  >>
How can I figure it out? please help me

Best Answer

It sounds like a currupt Matlab installation. I would suggest you reinstall Matlab and if the problem still persists, call the Mathworks support.
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