Hi All, I am trying to use Athena to do some PCA work and am having trouble getting the target transform analysis to work. When I click the target transform button no TT coefficients are produced and only a residual that is shaped like the original spectrum to be transformed is plotted. This seems to happen for all of my standards. (For my data in norm3.prj I am doing the PCA on all the spectra that start with TMF and trying to target transform the other spectra.) I have also tried this with the cyanobacteria data in the XAS-Education folder (also attached) to ensure it wasn't just a problem with my data. I am still have the same problems with this file as well. The dathena.log file and screenshot come from trying to target transform using this file. I am running a 64-bit version of Windows 7 and am running the 0.9.18 version of Athena. Thank you for any help you can provide! Cheers! -- John Hayes The Grosvenor Group Dept. of Chemistry University of Saskatchewan “Somebody told me it was frightening how much topsoil we are losing each year, but I told that story around the campfire and nobody got scared.”