version 3.05 compiles without problems on the same machine. -- Rainer Böckmann Theoretical Molecular Biophysics Group Max-Planck-Institute for Biophysical Chemistry Am Faßberg 11 D-37077 Göttingen Tel.: +49(551)201-1141, Fax.: +49(551)201-1089 email: rboeckm at gwdg.de