Vijay, I have used SixPack sometimes. The programming is a little less forgiving than Athena and Artemis for inputting of data. What I would try if I were you is first importing your data into Athena. I've only used this program for PCA and LCF so I don't know if this will work for the other types of analysis but this is what I do to get my data working. 1) Import the data into Athena (which requires that you specify your mu0, muE) 2) Click on the checkbox for the individual file that you want to make "ready" for SixPack 3) Go to file -> saved marked group to file as -> mu(E) .. (( if you want to export it as normalized that is fine but make sure you do your background subtraction, I still save it as a .mu in that case anyhow but I just choose norm(E) instead of mu(E) )) 4) Then Athena prompts you with "marked".. What you need to do is to save it as a .mu file ((or .chi if you're doing EXAFS analysis, but I have not done that so you're going to have to figure out how to do that if that's what you're needing it for)).. So an example file name is one.mu.. (don't put numbers in your file name, the compiler doesn't like it, i.e. cu2ostd.mu is a bad file name) 5) I prefer to remove the header files from the .mu file itself (the stuff with the '#' symbol), I forget if this upsets the SixPack program. Please see below for what type of file output that I have been able to use. Then in the end you should have two columns, instead of the three that you had in your mail that you sent to the list. If you want me to send you an example file, just e-mail me. Example output of a file that I exported from Athena to imported into SixPack: 7068.0174 -0.18245200 7068.9274 -0.18305700 7070.0074 -0.18422800 7070.9874 -0.18216700 7071.9974 -0.18503600 7072.8774 -0.18276100 7074.0574 -0.18661000 7075.1174 -0.18699300 7076.0174 -0.18723800 7076.9074 -0.18667400 7077.9074 -0.18584000 7079.0474 -0.19024300 I hope this helps! Andrew Campos