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Hi, this concerns the hadronization error. Reading the BAD (ch. 7.11.3) I understand that to evaluate the error due to uncertainties in the hadronization model, you do the fit once using only nonresonant and once using only hybrid model MC for the Vub MC. You find a difference of 3.0% there between the final results (I assume with final result you mean BRBR, correct?). If I go through the fit one time using only the nonres MC and one time only using the mix MC, I find really different results for BRBR (using the default binning, i.e. one bin until the cut), though: with only nonres: BRBR 0.032563 0.0033704 0.00145874 with only hybrid: BRBR 0.0132341 0.001452 0.000574687 using the default mixture: BRBR 0.0219666 0.00234676 0.000873771 This does not at all look like a 3.0% error. Did I misinterprete the description? Did you change anything else than just using only one type (nre,mix) for the Vub MC? Or maybe I misunderstood something else? Thanks, Kerstin