Jean-Baptiste Devivie At least, the follwoing xKalman's parameters are different with the default values: Default JBD - XKaEventCollection.InputForSILcliusters 0 1 - XKaSeedALL.RoadParameter 0.5 0.7 (Pt) 20.0 15.0 (dZ) - XKaMField.MagneticField 4 3 - XKaMan.Selectivity 7 2 - XKaMan.PrimaryVertexSearch false true