Sean, The other bit of advice that I could make about getting Ifeffit to do your thing at the command line is to examine the contents of the Ifeffit buffers in Athena and Artemis. A&A use a very verbose style of interaction with Ifeffit, but in fact they excercise almost all parts of Ifeffit. Thus studying the Ifeffit buffer is a good way to learn how to interact with Ifeffit's command line. Go to the Edit menu of either program or hit control-1 to display the buffer. Then watch what gets written as you do stuff in the GUI. B -- Bruce Ravel ---------------------------------------------- bravel@anl.gov Molecular Environmental Science Group, Building 203, Room E-165 MRCAT, Sector 10, Advance Photon Source, Building 433, Room B007 Argonne National Laboratory phone and voice mail: (1) 630 252 5033 Argonne IL 60439, USA fax: (1) 630 252 9793 My homepage: http://cars9.uchicago.edu/~ravel EXAFS software: http://cars9.uchicago.edu/~ravel/software/exafs/