Everyone, thanks for the info on self absorption! I'm currently working on writing a short summary for our group based on the information everyone shared. Bruce, I'm having an issue importing a k3-weighted project into Artemis from Athena. (I looked on the mail list and your webpage for a bug report and couldn't find one, my apologies if I missed it.) The problem: I'm trying to import a k3-weighted spectrum into Artemis, but it appears to be importing the k2-weighted spectrum instead. I don't know if this is related or a change between versions of Artemis, but the k-weight used in Athena isn't being carried over into Artemis as the fit k-weight as well. Attached is the Athena and Artemis projects showing this and a pdf with pics of the 2 spectra I'm seeing (in case this is an issue only on my computer). I tried changing the group name and deleting all the groups in Athena except the one I wanted and this still occurs. Any ideas on how to get around this? FYI: I'm running Athena (0.8.054) and Artemis (0.8.011) on a laptop (1.7 GHz Pentium M processor & 2 GB RAM) with Windows XP Pro. Thanks!! -Richard -- Richard Mayes Barnes Group 450/452 Buehler Hall Department of Chemistry University of Tennessee Knoxville, TN 37996