  We study the formation of fragments by extending the minimum spanning tree
method (MST) for clusterization. In this extension, each fragment is subjected
to a binding-energy check calculated using the modified Bethe-Weizsacker
formula. Earlier, a constant binding-energy cut of 4 MeV/nucleon was imposed.
Our results for 197Au +197 Au collisions are compared with ALADiN data and also
with the calculations based on the simulated annealing technique. We shall show
that the present modified version improves the agreement compared to the MST
method.
