Matlab can not find my m-files and gives this failure notice even when in the path.

>> [f1 f2] = READ2F ('4RA1324A.DAT'); Cannot find an exact (case-sensitive) match for 'READ2F'. Do you want: READ2F (in C:\Users\xxx\Documents\MATLAB\READ2F.M)?

My old READ2F.m file is in the path, yet I get this message. Same result for ALL and ANY m files attempted.

------Interestingly, no opportunity to say "yes" to this question. Clarity greatly appreciated.

Answer 1

[Jan]

Do you use the exact upper/lower case of the functions? Please check this by:

which read2f -all

What does "same result for ALL and ANY m files attempted" mean exactly?

[Lloyd]

I like that which thing. It just confirmed that it is looking in the right place.

Something dumb I am doing with fopen structure that MATLAB used to love, and now hates.

Thanks!

Answer 2

[Walter Roberson]

I remember that perhaps a month ago someone ran in to something similar. I seem to recall that it was a MATLAB PATH problem for them -- a typo along the way.

Errors of this nature can sometimes also happen if there are spaces in directory names that are not being protected against. For example,

cd C:\Users\Walter Roberson\Documents

is a problem because the command/function duality of MATLAB would treat this as

cd('C:\Users\Walter','Roberson\Documents')

MATLAB PATH problems can also occur when networked filesystems are involved, if one of the systems sees the file as being in a different location than the other does. Or sometimes networked file systems are obstinate about remote authentication and can refuse to believe that you (remotely) are the person who (locally) owns the files when exclusive access owner or group access has been configured.

Answer 3

[Lloyd]

I see the error occurs between release 10b and 11.

I found a machine with 10 on it, and it all works.

So I looked a bit further and suspect that:

It has something to do with my original use of fopen

What I want is to be able to call the function and any one of the data files I use

fid = fopen(nasafile); if (fid < 0) error(['Could not open file: ' nasafile]); end comments=fgetl(fid);

My guess is it's fopen(nasafile) that is the problem

If I run the function, and forget the fid = fopen(nasafile);

it all works fine.

what is intriguing, is that MATLAB 10b and before would run the function no problem.

Standing by to be embarassed.

[Walter Roberson]

To check: you are indicating that when you fopen() that file, that after that it complains about not being able to find matches for everything ?

Hmmm... could you try

which -all fopen

just in case somehow your own fopen.m is in the path ?

Answer 4

[Jerome]

Probably because of this: http://blogs.mathworks.com/desktop/2011/10/24/function-name-case-sensitivity-in-matlab-r2011b/

Try renaming the function's file extension *.m as *.M, or vice versa.