error on startup - how do I fix this?

hi everyone,

I have a problem on startup. After a fresh install of 2012b I was welcomed by the following message:

Cannot find function, getDefaultUserFolder, in library services.
Warning: MATLAB did not appear to successfully set the search path. To recover for this session of MATLAB, type "restoredefaultpath;matlabrc". To find out how to avoid this warning the next time you start MATLAB, type "docsearch problem path" after recovering for this session.
Warning: Duplicate directory name: C:\Program Files\MATLAB\R2012b\toolbox\local
Warning: Initializing Handle Graphics failed in matlabrc.
This indicates a potentially serious problem in your MATLAB setup,
which should be resolved as soon as possible.  Error detected was:
MATLAB:undefinedVarOrClass
Undefined variable "graphics" or class "graphics.internal.initializeMATLABRoot".
Warning: Initializing Java preferences failed in matlabrc.
This indicates a potentially serious problem in your MATLAB setup,
which should be resolved as soon as possible.  Error detected was:
MATLAB:UndefinedFunction
Undefined function 'usejava' for input arguments of type 'char'.
> In matlabrc at 110 
Warning: Failed to add default profiler filters.
> In matlabrc at 163 
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
  at com.mathworks.mlwidgets.graphics.ModelStateFactory.createNoSelectionModelState(ModelStateFactory.java:242)
  at com.mathworks.mlwidgets.graphics.PlotToolSetFactory$3.parseComplete(PlotToolSetFactory.java:122)
  at com.mathworks.mlwidgets.graphics.ModelStateFactory$ProductInfoListener$1$1.run(ModelStateFactory.java:1023)
  at java.awt.event.InvocationEvent.dispatch(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)
com.mathworks.jmi.MatlabException: Cannot find function, getDefaultUserFolder, in library services.
  at com.mathworks.jmi.NativeMatlab.SendMatlabMessage(Native Method)
  at com.mathworks.jmi.NativeMatlab.sendMatlabMessage(NativeMatlab.java:219)
  at com.mathworks.jmi.MatlabLooper.sendMatlabMessage(MatlabLooper.java:120)
  at com.mathworks.jmi.Matlab.mtFeval(Matlab.java:1540)
  at com.mathworks.jmi.MatlabWorker.feval(MatlabWorker.java:197)
  at com.mathworks.appmanagement.GetAppInstallDirectoryWorker.doOnMatlabThread(GetAppInstallDirectoryWorker.java:20)
  at com.mathworks.appmanagement.GetAppInstallDirectoryWorker.doOnMatlabThread(GetAppInstallDirectoryWorker.java:7)
  at com.mathworks.appmanagement.AbstractAppManagementMatlabWorker.runOnMatlabThread(AbstractAppManagementMatlabWorker.java:21)
  at com.mathworks.jmi.MatlabWorker$2.run(MatlabWorker.java:79)
  at com.mathworks.jmi.NativeMatlab.dispatchMTRequests(NativeMatlab.java:364)

How do I fix this? plz

Answer 1

[Andreas Goser]

Sorry, that may be obvious, but still relevant:

To recover for this session of MATLAB, type "restoredefaultpath;matlabrc". To find out how to avoid this warning the next time you start MATLAB, type "docsearch problem path" after recovering for this session.

Answer 2

[joe]

i type "restoredefaultpath;matlabrc". The following message is: Error using feature Cannot find function, getDefaultUserFolder, in library services.

Error in userpath (line 57) p = system_dependent('getuserworkfolder');

Error in restoredefaultpath (line 52) matlabpath([userpath, RESTOREDEFAULTPATH_result]);

[Andreas Goser]

1. Uninstall MATLAB
2. Install again
3. If this still fails, call installation support

[Andreas Goser]

Or actually search first: http://www.mathworks.de/matlabcentral/answers/39976-error-in-getdefaultuserfolder-at-matlab-startup