Hello everybody, My question is included in the subject of this email: Is there a way to force Galaxy to hide a specific output (of a tool) if this output is empty (or if the file does not exist in the job_working_directory repository) ? Thank you in advance, Have a nice day A. Bernard -- Aurélien Bernard IE Bioprogrammeur - CNRS Université des sciences Montpellier II Institut des Sciences de l'Evolution France