error loading path

I get this message everytime i open matlab

Warning: C:\Program Files\MATLAB\R2011b\toolbox\local\pathdef.m not found.
Toolbox Path Cache is not being used. Type 'help toolbox_path_cache' for more info
Undefined function or variable 'ispc'.
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\R2011b\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 113 
Warning: Failed to add default profiler filters.
> In matlabrc at 161

How can i resolve this problem

Answer 1

[Gareth]

I've just put a clean install of 2011b onto a newly rebuilt Win7 machine and had the same problem. The issue appears to be that the pathdef.m file is absent, rather than corrupt or mis-located.

Having performed the "restoredefaultpath;matlabrc" fix mentioned above I then navigated to the C:\Program Files\MATLAB\R2011b\toolbox\local folder and typed "savepath pathdef.m". The system now appears to be working normally.

[Sam2012]

thanx that worked perfectly for me .. although cant figure waht the problem actually was

[Jason Atwood]

Same problem here. Solution worked +1. I'll just add to those reading this, the "restoredefaultpath;matlabrc" command might take a minute; keep an eye on the busy/ready signal from MATLAB.

[auir 57]

Worked like a charm :) Thanks

[Muhannad Al-Qaisi]

back from 2020 , worked +2. <3

[Yamane]

this is an answer that help ! thanks

[MB]

Thanks !!! It actually worked :)

[Andres Felipe Herrera Acero]

Buen día, alguien me podria ayudar con este error. No se que es Mecanografiar el archivo. Si me pueden ayudar con el paso a paso gracias.

[Hannes Qualo]

Cheers! Worked for me.

[Rafal]

Solution still works(2020b), thanks!

[breathi]

When working with multiple users on a device and/or users without admin rights, the solution is more likely related to restriced access rights to the pathdef.m. Using the method described here will likely fix it for your user, but destroy it for everyone else.

Check the other reply by Sanjay to see if it is an access right problem first (by trying to edit pathdef.m in an extrnal editor).

Answer 2

[Sanjay Manohar]

I found this was because of an user access control problem. The file MATLAB\toobox\local\pathdef.m was not accessible.

I had to go to "Program Files\MATLAB" in explorer, right click, properties, security, permissions, Add, Everyone, Allow full access.

This solved the problem.

[Anurag Khergade]

Thank you Sanjay

[John Taco Lopez]

it worked for me in 2017b, thanks

[Serge]

The accepted answer did not work for me, but this answer did!

So this did NOT work:

1) >> restoredefaultpath;matlabrc

2) cd C:\Program Files\MATLAB\<version>\toolbox\local\

3) >> savepath pathdef.m (and said ok on the Admin prompt that came up and it did write a pathdef.m file)

I also tried to do the same when running MatLab as administrator, but with no luck.

But this did work:

1) Navigate to C:\Program Files\MATLAB\<version>\toolbox\local\pathdef.m

2) right click > properties > security > Edit > Add > Type "Everyone" > Ok > Select Everyone > tick "Full Controll" > Ok

(Note you may need to create the file first, if missing, using the first 3 step)

Answer 3

[Jason Ross]

Did you do what it tells you to do in the message?

"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."

You basically need to get the path into a decent shape (using restoredefaultpath) and then figure out how it got there and fix it (using the doc reference provided)

[ouss ben]

Yes I did what's told to do in this message.

It repairs the problem temporarily, but once I start for a second time I have the same problem.

Can I create or download a pathdef.m file?

[Image Analyst]

Search all your m-files (I assume you know how to do that in a variety of ways) for "savepath" and see if it's there. Perhaps you're messing up the path and then saving some bad path.

Answer 4

[GAB_image]

Hello,

I'm using Mac Catalina OS for running Matlab 2019b and I'm getting the following error-warning message when initiating the session:

Warning: Initializing 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:format:UnknownOption

Invalid format option sh.

> In matlabrc (line 52)

I have tryied "restoredefaultpath;matlabrc" but did not work ... and "savepath" as well but also did not work...

Matlab 2019b works and open session in the correct path folder but the warning - error does not disappear

How could I solve this problem ?

Thanks a lot