Why do I receive an error when trying to import a MAT file in MATLAB 7.0 (R14)?

When I try to run the commands :

clear;

v6file='original';

v7file='new';

load(v6file);

save(v7file,'a','b','c','d'); 

load(v7file);

where original.mat is a MAT-file created in MATLAB 6.5 ( R13).

I get the error:

 ??? Error using ==> load

 Unable to read MAT-file C:\MATLAB7\work\new.mat

 File may be corrupt.

Even when I save the variables without Unicode, using the command:

save(v7file,'a','b','c','d','-nounicode'); 

load(v7file)

I receive the same error.

Answer 1

[MathWorks Support Team]

This bug has been fixed in Release 2006a (R2006a). For previous product releases, read below for any possible workarounds:

This bug has been fixed for Release 14 SP1 (R14SP1). For previous releases, please read below for any possible workarounds:

This has been verified as a bug in MATLAB 7.0 (R14) in the way that it handles the loading of MAT files.

Currently to work around this issue, use the '-v6' option to save the MAT file in a MATLAB 6.5 (R13) compatible version:

v6file='original';

v7file='new';

load(v6file);

save(v7file,'a','b','c','d','-v6'); 

% The following line should be executed from MATLAB 6.5 (R13)

load(v7file)