Dear Wien2k users, Are there any ony to help and say me why these data are different with each other as follows: year method HFF(Mn) HFF(As) Vzz(Mn) Vzz(As) --- 1996 FPLAPW+GGA 137 568 0.37 12.08 --- 2007 APW+lo+GGA -50 315.4 -3.8 1.45 --- These data are related to MnAs compound in phase of hexagonal NiAs structure. Your's Morteza