Hi Bruce, I seem to be encountering a bug in adding paths to a FEFF calculation with Artemis. To see this bug, follow these steps: 1) open the Artemis project that comes with the distribution under ifeffit/examples/Artemis/ybco/cu.apj (that's the YBCO copper edge project) 2) Discard a path (#4 is what I just tried) under the FEFF1 calculation. Make sure it's the one under FEFF1, and not FEFF0. 3) Click on FEFF1 under the Data & Paths pane, so that the interpretation of that calculation shows. Right click on path 4 in the interpretation, and choose "Add feff0004.dat to path list." When I do this, it adds to the FEFF0 calculation, rather than the FEFF1 calculation as it should. Or, try this instead for step 3: 3) Click on FEFF1 under the Data & Paths pane. Go to the "theory" menu at the top, and choose "Add a feff path." Then select feff0004.dat from the list. When I do it this way, it ends up as a totally new FEFF calculation, rather than as part of FEFF1. I am using Windows XP and Artemis 0.7.010. --Scott Calvin Sarah Lawrence College P.S. Do you prefer me to identify bugs the way I did here, by telling you how to reproduce it using an example file, or by sending you a project file myself? It makes sense to me that I refer it to an example file that you more or less know the history of, but if you'd rather I send project files myself, I'm happy to do that.