新人saber仿真出错，束手无策啊

line 20 of fangzhen.sin near "0.irf540_4": *** ERROR "MAST_FILE_NOT_FOUND" ***Cannot find the file "irf540.sin" using "SABER_DATA_PATH".

line 20 of fangzhen.sin near "_9 g:n_0 ": *** ERROR "MAST_UNDEF_TMP" ***Undefined template "irf540".