Hi Stefano, Hmm, I'm not sure what's wrong. This input file runs fine for me on a linux system and a Mac OSX system. What system are you using? Normally, I'd suspect that this sort of error was due to a problem with line endings, especially since the way you posted the file had an 'extra line' between each real line. But I thought I had fixed this for feff6L02, so that it would no longer be a problem. If you're working on a Unix system, see if there is a program called dos2unix and try running it on the input file. If you're working on Windows, you can tell if the file has the wrong line endings by opening it with Notepad. If it displays correctly, it has the right line endings. If it looks like the whole file is one line, the line endings are wrong. To fix a bad file, open the file with Wordpad (not Notepad), copy all the contents (ctrl-a, ctrl-c), then paste into a new file, or even into Notepad. Hope that helps. If this does solve the problem, please let me know what the conditions were (how the file was created and edited, system used, ifeffit verions) that made this fail. It's supposed to be able to deal with such line ending issues. --Matt