Dear list, I have a big collection of data from a catalytic reaction. I tried to export all the spectra (about 200) to a unique file containing the normalized ones. I used the "File>Save marked groups as>norm(E)" option. Unfortunately, Athena (Demeter 0.9.18) is not able to make one unique file (it crashes and I have to initialize it again), instead I had to creat 4 different files of 45 spectra each (the maximum group I could gather on a file). Is there any bug on it or some kind of limitation to creat these kind of files? Best regards, *Danilo OLIVEIRA DE SOUZA* (PhD) Université de Sciences et Technologies de Lille (Université Lille 1) UCCS - Unité de Catalise et Chimie du Solid, Bat. C3, 110. Cité Scientifique, 59655, VIlleneuve d'Ascq CEDEX, France. danilo.olsouza@gmail.com d.oliveira-de-souza@ed.univ-lille1.fr tel: +33 06.63.55.86.12