I added the plots for data chi^2 scaling, just click on the scaling factor to get the plot. > why did you rescale in the non-extended chi^2 fit with > the chi^2 fit you find in the histo of the extended NLL? Well, it was the old behaviour of the macro, when I was trying to make it work for the Extended fit. It is probably better to recalculate it with the chi^2 I get from the non extended chi^2 fit. bye, Antonio