Dear all User When we are runing the SCF with runsp_lapw, the SCF stopped at the CORE of the twelfth cycle , it shows: "PGFIO-F-231/formatted read/unit=19/error on data conversion File name=CHNO.vnsdn formatted,sequential access record=35 In source file fcore.f, at line number 35." What this mean? and how do I eliminate it? best wishes F.X.Zu