Hi Bruce This is so minor that I am unsure whether to report it, but working on a windows xp computer the add a site button in atoms doesn't seem to work. I found it initially, when entering a partial occupancy containing cif where I was manually entering the atom positions as I am rubbish at editing the cif properly. The easy work round is to write out the partial .inp file and then edit the extra sites in a text file and read it back in. I then started a new artemis session and found the button still did nothing. I then read in an .inp file and the button still does nothing. I filled it up the six rows with meaningless sites so there were no blank sites left and .... I attach a log of that session. Though it doesn't seem to have much in it. And the project which is rather meaningless as it crashes artemis when I try to re-open it. (the log says there's a method group problem. But that's not the bug I am reporting. Copying and pasting rows keeps the no of empty rows as well so that's another way round it. By the way it's great atoms reads cif files without problems (except PO sites nowadays) Cheers Fred Prof. J F W Mosselmans Principal Beamline Scientist I18 Diamond Light Source Diamond House Harwell Campus Didcot Oxon OX11 ODE UK -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom