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
Guillaume
Guillaume on 9 Jul 2019
Another possibility is that the file is already opened (with write access) by some other program. In any case, matlab just asks the OS to open the file for write access. It's the OS that tells matlab it's not possible. Nothing matlab can do anything about.
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
Hi Jan
Thanks for your response
I am not getting any error but the data is not written to the text file
How do I solve this
Thanks in advance
Tino
Tino on 9 Jul 2019
Located the files lol

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