Exception in thread "Startup Class Loader" and Exception in thread "AWT-EventQueue-0"

Hi all, when I am starting Matlab R2019b I get following warning in the command window:

Exception in thread "Startup Class Loader": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.instutil.InstutilResourceKeys

at com.mathworks.mlwidgets.help.DocCenterRoot.initDocRelease(DocCenterRoot.java:44)

at com.mathworks.mlwidgets.help.DocCenterRoot.<clinit>(DocCenterRoot.java:26)

at com.mathworks.mlwidgets.help.HelpPrefs.<clinit>(HelpPrefs.java:49)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:264)

at com.mathworks.mlservices.MLHelpServices.getDocRoot(MLHelpServices.java:522)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getDocrootDirectory(ProductInfoUtils.java:698)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAbsolutePath(ProductInfoUtils.java:685)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFile(ProductInfoUtils.java:250)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFiles(ProductInfoUtils.java:310)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.pathChanged(ProductInfoUtils.java:154)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<init>(ProductInfoUtils.java:80)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAllProductsInfo(ProductInfoUtils.java:891)

at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<clinit>(ProductInfoUtils.java:66)

at java.lang.Class.forName0(Native Method)

at java.lang.Class.forName(Class.java:264)

at com.mathworks.mde.desk.StartupClassLoader$LoadInfo.<init>(StartupClassLoader.java:112)

at com.mathworks.mde.desk.StartupClassLoader.createLoadInfos(StartupClassLoader.java:202)

at com.mathworks.mde.desk.StartupClassLoader.access$500(StartupClassLoader.java:25)

at com.mathworks.mde.desk.StartupClassLoader$2.run(StartupClassLoader.java:223)

at java.lang.Thread.run(Thread.java:748)

Exception in thread "AWT-EventQueue-0": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.instutil.InstutilResourceKeys

at com.mathworks.matlab_login.MatlabLogin.getInfoToCallEmbeddedLogin(Unknown Source)

at com.mathworks.mde.desk.LoginStatusIndicator.setupLoginButtonAndUI(LoginStatusIndicator.java:224)

at com.mathworks.mde.desk.LoginStatusIndicator.access$100(LoginStatusIndicator.java:53)

at com.mathworks.mde.desk.LoginStatusIndicator$2$1.run(LoginStatusIndicator.java:167)

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)

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)

Does anyone have an idea about what is wrong?

Greetings

Thomas

Answer 1

[Thomas Lang]

For those who are having the same problem:

Uninstall and install Matlab again!

Answer 2

[ziyu ye]

I also have this problem when starting r2019b in virtual machine.

Answer 3

[Yining]

me either