Why did I get this bunch of funny messages after installing R2021a?

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Ken Bannister
Ken Bannister 2021-6-22
评论： Star Strider 2021-6-22
After I let the MATLAB installer install Home Use R2021a on my Lenovo laptop with Windows 10, the MATLAB screen displayed this bunch of messages. The installation otherwise seems to work OK. Are they just harmless squawking and thus ignorable?
=======================================================================================================
Caught "std::exception" Exception message is:
Error open a file stream for write.
Home License -- for personal use only. Not for government,
academic, research, commercial, or other organizational use.
Exception in thread "AWT-EventQueue-0": java.security.PrivilegedActionException: java.io.FileNotFoundException: matlab.desktop.currentfolder.detailviewer.Collapsed
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.io.FileNotFoundException: matlab.desktop.currentfolder.detailviewer.Collapsed
at com.mathworks.services.settings.Setting.nativeSet(Native Method)
at com.mathworks.services.settings.Setting.set(Setting.java:913)
at com.mathworks.services.settings.Setting.set(Setting.java:769)
at com.mathworks.services.Prefs.changeSettingValue(Prefs.java:1198)
at com.mathworks.services.Prefs.setPrefValue(Prefs.java:1123)
at com.mathworks.services.Prefs.setBooleanPref(Prefs.java:960)
at com.mathworks.mlwidgets.explorer.ExplorerSplitPanePrefs.setCollapsed(ExplorerSplitPanePrefs.java:56)
at com.mathworks.mlwidgets.explorer.DetailViewer.expand(DetailViewer.java:400)
at com.mathworks.mlwidgets.explorer.ExplorerSplitPane$3.run(ExplorerSplitPane.java:127)
at com.mathworks.mwswing.MJUtilities.runOnEventDispatchThread(MJUtilities.java:911)
at com.mathworks.mlwidgets.explorer.ExplorerSplitPane.syncDetailViewerSizeFromPrefs(ExplorerSplitPane.java:118)
at com.mathworks.mlwidgets.explorer.ExplorerSplitPane.initialize(ExplorerSplitPane.java:87)
at com.mathworks.mde.explorer.Explorer$19.run(Explorer.java:1018)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
... 9 more
Exception in thread "AWT-EventQueue-0": java.security.PrivilegedActionException: java.security.PrivilegedActionException: java.io.FileNotFoundException: matlab.workingfolder.LastFolderPath
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.security.PrivilegedActionException: java.io.FileNotFoundException: matlab.workingfolder.LastFolderPath
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
... 9 more
Caused by: java.io.FileNotFoundException: matlab.workingfolder.LastFolderPath
at com.mathworks.services.settings.Setting.nativeSet(Native Method)
at com.mathworks.services.settings.Setting.set(Setting.java:913)
at com.mathworks.services.settings.Setting.set(Setting.java:769)
at com.mathworks.services.settings.Setting.set(Setting.java:709)
at com.mathworks.mlwidgets.prefs.InitialWorkingFolder.setStringSettingValue(InitialWorkingFolder.java:50)
at com.mathworks.mlwidgets.prefs.InitialWorkingFolder.access$000(InitialWorkingFolder.java:15)
at com.mathworks.mlwidgets.prefs.InitialWorkingFolder$1.actionPerformed(InitialWorkingFolder.java:34)
at com.mathworks.jmi.MatlabPath$DeferredActionEvent.dispatch(MatlabPath.java:168)
at com.mathworks.util.QueueEvent$QueueTarget.processEvent(QueueEvent.java:85)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
... 14 more

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