Caught "std::exception" Exception message is: Error open a file stream for write.

I'm receiving this error with Matlab 2021b installed on a physical server, the same version of matlab on a different server is working fine. A way to consistently reproduce the issue is deleting directly a large amount of files without recycling them. I've already tried to uninstall, clean the Roaming directory and install back the Matlab.

[Image Analyst]

Why are you calling fwrite()? What did you do? Just call the delete() function with "recycle off"? Do you have permisson on that server to do the deleting?

[Giuseppe Galeone]

Actually i'm not calling fwrite. This is the snippet:

err = [];

try

D = dir(sprintf('%s*_%s.json',DIR_JSON,environment_text));

if (~isempty(D))

for i=1:length(D)

if (mjuliandate(D(i).date) < (mjuliandate(now) - OUTPUT_MAX_DAYS))

filename = sprintf('%s%s',DIR_JSON,D(i).name);

%recycle off;

delete(filename);

%recycle on;

end

end

disp_now(sprintf('*** DIRECTORY "%s" CLEANED',DIR_JSON));

end

catch err

end

If i don't comment the recycle off and on the issue occurs. Yes i have all the privileges. This happens when the directory contains a large number of files.

Answer 1

[Image Analyst]

Maybe try putting in

pause(0.2);

in case it's a timing issue.

[Giuseppe Galeone]

Tried but this doesn't solve the issue. I rolled back to 2020b version and issue is not there, so it seems something specific of 2021a and 2021b version.