导网络表出错~！求救啊！

我在想allegro导入网络表时提示出错：
#1 ERROR(315) PST file error detected.
No sections found in part 'TH8_4_MOUNTH_TH8_4'.
#2 ERROR(315) PST file error detected.
Section number of instance '@RR4320_SCH_1.1_062807_AP.RR4320(SCH_1):INS23965747@LIBRARY1.TH8_4.NORMAL(CHIPS)' on package 'H2' is greater than number of sections in part 'TH8_4_MOUNTH_TH8_4'.
#3 ERROR(315) PST file error detected.
Section number of instance '@RR4320_SCH_1.1_062807_AP.RR4320(SCH_1):INS23966942@LIBRARY1.TH8_4.NORMAL(CHIPS)' on package 'H1' is greater than number of sections in part 'TH8_4_MOUNTH_TH8_4'.
#4 ERROR(102) Run stopped because errors were detected

请问这是什么意思啊？？封装是对应PCB的封装的，只是这是个安装孔，在原理图中赋予gnd网络但没有走线。请各位大侠指点！