Well, it is certainly a step in the right direction to actually install the perl interface to Ifeffit before attempting to use Athena ;-) I find the message you sent encouraging. It tells me that perl is actually attempting to communicate with the ifeffit library. So Ifeffit.pm is in the right place and is working. I would guess that the swig wrapper is not compiled correctly. I barely understand swig on a nice warm fuzzy linux system, so I am not sure how much advice I have for making it work on the mac. Some time spent at http://www.swig.org might help. My hunch is that someone is going to have to generate a wrapper for the Mac on the Mac. HTH, B -- Bruce Ravel ----------------------------------- ravel@phys.washington.edu U.S. Naval Research Laboratory, Code 6134 phone: (1) 202 767 5947 Washington DC 20375, USA fax: (1) 202 767 1697 NRL Synchrotron Radiation Consortium (NRL-SRC) Beamlines X11a, X11b, X23b, X24c, U4b National Synchrotron Light Source Brookhaven National Laboratory, Upton, NY 11973 My homepage: http://feff.phys.washington.edu/~ravel EXAFS software: http://feff.phys.washington.edu/~ravel/software/exafs/