Others have solved your problem but I have a small suggestion. Add a file test in your while loop to make sure you aren't trying to open a directory named 'test.txt' contained in $fichier.

next unless -T "$dossier/$fichier";

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In reply to Re: Trouble opening files from a directory: "no such file". by Gulliver
in thread Trouble opening files from a directory: "no such file". by Alienor

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