Matlab can't load pathdef.m - matlab

Question

When launching Matlab I get huge Error. It says it can't load pathdef.m
When I'm using Windows Explorer I'm not able to open that file either.
I'm using a school computer remotely, which is not supported by the IT department. My instructor lets me use this 'Super-Computer' for heavy calculation and he doesn't wan't to make any changes since there are other users using it simultaneously.
I've been able to just write: "restoredefaultpath;matlabrc" and I'm able to use Matlab again... but without the toolbox I think... and I believe I need it now since I'm not able to use.
h = figure(1);
hold on
[AX,H1,H2]= plotyy(x1,y1,x2,y2);
set(AX,{'XScale'},{'log';'log'})
set(AX,{'ycolor'},{'b';'r'})
legend('Data 1','Data 1')
xlabel('X AXIS')
ylabel(AX(1),'Y1 Axis')
ylabel(AX(2),'Y2 Axis')
grid on
The variable AX is defined as a number instead of a Axes Handle. Is there any way through this?
Here is the full error:
C:\Program Files\MATLAB\R2013a\toolbox\local\pathdef.m: Cannot open file: permission denied.
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\R2013a\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 149
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$3.parseComplete(PlotToolSetFactory.java:127)
at com.mathworks.mlwidgets.graphics.ModelStateFactory$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)

Answer 1

C:\Program Files\MATLAB\R2013a\toolbox\local\pathdef.m: Cannot open file: permission denied.
The rest of the errors are created by it. Even the Java not initializing.
As #excaza says, it must be an IT fault. MatLab is reaching the file, but lacks permissions to open it.
Try to use your instructor account and run MatLab as admin. Some professors may have admin rights.
"On a Windows® system with User Account Control (UAC) enabled, you might be prompted to allow the update operation because it requires administrator-level permission."