Hi, I have copied a ppt- and pdf-version of a transparency describing what Wolfgang has done concerning the fallback solution: http://iktp.tu-dresden.de/~lacker/fallbacksolution.pdf http://iktp.tu-dresden.de/~lacker/fallbacksolution.ppt >From what I have seen in Wolfgang's directories it looks like that the chi^2 values are good: http://www.slac.stanford.edu/~menges/Vub/scra/intpur Maybe somebody else can also have a look...? Cheers, Heiko