Hello Matt and Paul, I verified the following: 1) here is the error message in the echo window Preparing to run FEFF ... Performing autosave ... Saving feff.inp file Performing autosave ... done! Running feff (this could take a few minutes, please be patient) ... Uh oh! That Feff calculation did not run successfully. 2) when I run the command "feff6" from the terminal, I get the following message: stefano% feff6 Feff 6L.02 Fatal Error: cannot open file "feff.inp" in module rdinp I interpret this message with the conclusion that I can just type 'feff6' in the Artemis preferences, as the command is actually seen and of course it is missing the feff.inp file if I run the command from the terminal. In the end, I have not been able to pinpoint the problem. Maybe a fault in the installer??? I am stuck. Stefano -- ____________________________________________ Stefano Ciurli Professor of Chemistry Laboratory of Bioinorganic Chemistry Department of Agro-Environmental Science and Technology University of Bologna Viale Giuseppe Fanin, 40 I-40127 Bologna Italy Phone: +39-051-209-6204 Fax: +39-051-209-6203 "Fatti non foste a viver come bruti, ma per seguir virtute e canoscenza" Dante Alighieri - Inferno - Canto XXVI "Ihr seid bestimmt, nicht Tieren gleich zu leben, Nein, Tugend zu erringen und Erkenntnis" "Ye were not form'd to live the life of brutes, But virtue to pursue and knowledge high"