Why do I receive an error when I try to change my keyboard shortcut preferences in MATLAB 7.9 (R2009b)?

I want to change my keyboard shortcut preferences in MATLAB 7.9 (R2009b), therefore I try to navigate to "File" -> "Preferences..." -> "Keyboard" -> "Shortcuts". However when I select the "Shortcuts" option I receive the following error:

 PrefsDialog: unable to find class com.mathworks.mlwidgets.prefs.binding.KeyboardShortcutsPrefPanel, with method createPrefsPanel.

 java.lang.reflect.InvocationTargetException

 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

 at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

 at java.lang.reflect.Method.invoke(Unknown Source)

 (...)

 Caused by: java.lang.NoClassDefFoundError: com/jidesoft/shortcut/ShortcutField

 at java.lang.ClassLoader.defineClass1(Native Method)

 at java.lang.ClassLoader.defineClass(Unknown Source)

 at java.security.SecureClassLoader.defineClass(Unknown Source)

 (snip)

Answer 1

[MathWorks Support Team]

This error can occur if there is something wrong with your 'classpath.txt' file. Most probably a customized classpath.txt which was based on the classpath.txt from a previous MATLAB version is used. To see which classpath.txt there are on your MATLAB path you can use the following command:

which -all classpath.txt

If you do not need a customized classpath.txt, remove all founds classpath.txt files except $MATLABROOT\toolbox\local\classpath.txt.

If you do need a customized classpath.txt, please create a new one which you base on $MATLABROOT\toolbox\local\classpath.txt.