confirm valid file identifier before flcose?
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I am using GUI callbacks to close a file. Sometimes the file is aready closed, and I get an invalid file identifier error. Is there a robust way to check if the file is still open before calling fclose? I have tried using fopen('all') but that does not always catch it.
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Les Beckham
2024-2-1
If you call fopen on the file identifier when the file is closed it will return empty (instead of returning the filename). So, you can do this:
if ~isempty(fopen(fid))
fclose(fid);
end
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