Exception in thread "AWT-EventQueue-0": java.lang.NoClassDefFoundError on command window.
37 views (last 30 days)
Show older comments
I am new to Matlab, learning in Uni. I installed MATLAB from my University license. So, No matter what I type on Command window, the command does execute, but also this long error text in red. For example:
>> 1+1
ans =
2
Exception in thread "AWT-EventQueue-0": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.mlwidgets.help.HelpPrefs
at com.mathworks.mlwidgets.help.HelpUtils.isDocInstalled(HelpUtils.java:453)
at com.mathworks.mde.functionhints.FunctionHints.openFunctionHints(FunctionHints.java:108)
at com.mathworks.mde.cmdwin.CmdWinEditorKit.maybeOpenFunctionHints(CmdWinEditorKit.java:1706)
at com.mathworks.mde.cmdwin.CmdWinEditorKit.access$1000(CmdWinEditorKit.java:88)
at com.mathworks.mde.cmdwin.CmdWinEditorKit$CWDefaultKeyTypedAction.actionPerformed(CmdWinEditorKit.java:2175)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1668)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2929)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
at com.mathworks.mde.cmdwin.XCmdWndView.processKeyEvent(XCmdWndView.java:2461)
at java.awt.Component.processEvent(Component.java:6316)
at java.awt.Container.processEvent(Container.java:2239)
at com.mathworks.mde.cmdwin.XCmdWndView.processEvent(XCmdWndView.java:439)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:835)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1103)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:974)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:800)
at java.awt.Component.dispatchEventImpl(Component.java:4760)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
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$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$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$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$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)
please help me fix it.
4 Comments
Walter Roberson
on 4 Mar 2022
I recommend you contact Mathworks for free installation support.
Mathworks Support will be closing for the weekend fairly soon, so you had best contact them immediately.
Answers (0)
See Also
Categories
Find more on Startup and Shutdown in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!