Error using save can't write file

Hi,

I have got this really strange error in matlab. When I try to run the command

save(fullfile('filepath','filename'),'var','-v7');

I get the error message,

error using save can't write file

but when I try

save(fullfile('filepath','filename'),'var','-v7.3');

everything works fine. The the variable takes some space on the workspace, 165MB, but the I would guess that the size should not be an issue here. Does anyone know why it does not work to save in "v7"?

For the one that want to confirm the size of the variable, I will add the "whos" information,

Name      Size                Bytes  Class     Attributes

myName    1x1             173081921  struct

BR/ Patrik

EDIT

The variable I try to save is a struct with plenty of fields. I have also tried to save a 3 dimensional matrix of size 800 mb which is larger, but goes through easily.

[Patrik Ek]

Does this have something with that the header becomes to large or something? Or is this a bug that should be reported to mathworks?

Answer 1

[Iain]

Some versions of the save function really don't react well to structures.

[Patrik Ek]

Ok so your guess that version 7 is one of them?

[raym]

I also encounter the same issue in R2016a.

I save a structure of unicode strings. when structure is small it saves Ok but when is large it failed.

Change to v7.3 also solves the problem.

I guess that vertain unicode in the strings cause the error.