'-v7.3' saving suddenly broken?

Hello,

I have been using the command save(filename,variables,'-v7.3') for a long time to save bigger variables. Those are stored to analyse them afterwards.

After a month of not using Matlab at all, suddenly '-v7.3' seems to produce only corrupted files as indicated by the following simple test:

a=1;
save('a','a','-v7.3')
load('a')
a

results in:

Error using load

Unable to read MAT-file

\filepath*\a.mat.

Not a binary MAT-file. Try load -ASCII to read as text.

* I do not want to put the whole private filepath here. But I checked it, it is correct and the file 'a.mat' is indeed present there.

while:

a=1;
save('a','a')
load('a')
a

works fine and results in:

a =

1

Dragging the '-v7.3' file into matlab with the mouse or selecting it from the "current folder" tap also delivers the same error message.

So the question is now "how to fix this?". I would be glad for any suggestions what goes wrong here!

Best

[Bjorn Gustavsson]

It works fine in matlab 2020a, what version are you running?

[Lisa Krainz]

Thanks for your interest in my problem.

I use '9.8.0.1451342 (R2020a) Update 5'

It worked with this version before. I don't know why it stopped working and I can't think of anything that was changed.

[Stephen23]

a = 1:3;
save('a','a','-v7.3')
S = load('a')

S = struct with fields:
    a: [1 2 3]

" do not want to put the whole private filepath here. But I checked it, it is correct and the file 'a.mat' is indeed present there."

That has a very strong smell to it.

[Lisa Krainz]

You are right! There seems to be an issue with our network. If I save it at a local filepath it works fine. It is still weired that save('a','a') still works for a location in our network.

Thank you very much! Now I know, that the problem needs to be solved elsewhere.

Best

[Walter Roberson]

These days, most of the people i see reporting these kinds of issues, seem to be using OneDrive. That could be Sample Bias: perhaps a lot more people are using OneDrive rather than it being inherently less stable.

[Lisa Krainz]

We use a huge local in-house network, but I don't know any details, because I am only a user. Personally I do not trust OneDrive or any other Cloud storage, that was not specifically selected or hosted by myself.