Dear Bruce,

The PCA fitting marked groups on Athena seems to have a problem in windows. Using your teaching example if you highlight several (e.g. 3 spectra ) and try to fit them to some standard using the fit marked group button the programme does some LCF fitting and then seems to be about to report the results but instead crashes. I have tried this on both windows xp and windows 7 platforms with the same results. Individual spectrum fitting works fine.

Log file attached

Thanks

Fred

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