Mex file entry point is missing, path messed up in Matlab 2012a

FYI, I posted this question on comp.soft-sys.matlab

with Matlab 2012a, on windows 7, I noticed Matlab is going for windows files before matlab's for some commands:

EDU>> ver
Mex file entry point is missing.  Please check the (case-sensitive)
spelling of mexFunction (for C MEX-files), or the (case-insensitive)
spelling of MEXFUNCTION (for FORTRAN MEX-files).
Invalid MEX-file 'C:\Windows\system32\version.dll':

so path is messed up:

EDU>> which ver
C:\Program Files (x86)\MATLAB\R2012a Student\toolbox\matlab\general\ver.m

EDU>> which input
C:\Windows\system32\input.dll

But I looked at my PATH in windows computer->Property, and I made sure Matlab is first thing. Restarted Matlab, and still the problem is there

My PATH from system:

C:\Program Files (x86)\MATLAB\R2012a Student\bin;C:\Program Files\Common Files\Microsoft etc..

So you see Matlab is first thing.

I also do not see System inside Matlab path command?

EDU>> findstr(path,'system32')

ans =

        []

EDU>> findstr(path,'windows')

ans =

        []

EDU>> userpath

ans =

       ''

MY question is: Where would Matlab be reading this wrong path from? Is there another place to fix the Matlab path?

related question:

http://www.mathworks.com/matlabcentral/newsreader/view_thread/285817

I rebooted windows. Problem is still there.

(ps. this forum is nice, I can edit my post here!)

thanks, --Nasser

Answer 1

[Nasser M. Abbasi]

can one answer their own question here? since I found the solution. If not, I can delete this answer and add this as comment or something. Do not know the rules here.

I just do not know why it happened. But doing this command fixed it

   userpath(path)

and now it works

which input
built-in (C:\Program Files (x86)\MATLAB\R2012a Student\toolbox\matlab\lang\input)

something cleared userpath somehow. I do not know how this happened. But I am happy now, Matlab is ok.

[Image Analyst]

You can mark your own answer as the answer if it was the one that solved it.

[Walter Roberson]

Adding your own answer, like you did, is good practice when you find a solution to a problem.

[James]

 userpath(path)....Does not work

Answer 2

[Image Analyst]

You might try the "restoredefaultpath" command and see if that fixes it.

[Nasser M. Abbasi]

Thanks ImageAnalyst for the suggestion. Tried it. did not fix the problem. ALso restarted Matlab. no change, still points to system:

EDU>> restoredefaultpath
EDU>> which input
C:\Windows\system32\input.dll

also

EDU>> restoredefaultpath; matlabrc
EDU>> which input
C:\Windows\system32\input.dll