Permission to write into text file

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Tino
Tino on 9 Jul 2019
Commented: Tino on 9 Jul 2019
Hello
I got the following error below:
Permission denied : I am unable to open file mojo.txt
find the code below
function savechangeptsButtonPushed(app, event)
writematrix(app.UITable.Data, 'mojo.txt')
end
end
What do I do to solve the issue
Thanks in advance
  6 Comments
dpb
dpb on 9 Jul 2019
"...Nothing matlab can do anything about."
Other than trap the OS error and report it which may (or may not) be more informative to the user than just "I can't do that!" and die.

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Accepted Answer

Jan
Jan on 9 Jul 2019
Edited: Jan on 9 Jul 2019
Do not use 'mojo.txt' as file name without a path. Remember, that any GUI or timer callback could call cd to change the current folder unexpectedly.
function savechangeptsButtonPushed(app, event)
folder = tempdir; % Insert your preferred folder here
file = fullfile(folder, 'mojo.txt');
try
writematrix(app.UITable.Data, file);
catch ME
error(['Cannot create file: %s', newline, '%s'], file, ME.message);
end
end
  2 Comments
Tino
Tino on 9 Jul 2019
Located the files lol

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