电磁式位移传感器骨架与连杆接触分析问题求助

clover023

在对电磁式位移传感器骨架与连杆进行接触分析时，每次到运行到ESURF这一步时，都提示 there are no elements defined，the ESURF command is ignored。
请问问题出在哪？？？
命令流如下
finish
/CLEAR
/filname，1-1,1
/PREP7
VSEL,S,,,1
NSLV,S,1
CM,ke,NODE
VSEL,S,,,4
NSLV,S,1
CM,gan,NODE
MP,MU,1
MAT,1
REAL,3
ET,2,170
ET,3,174
R,3,,,1,-0.001,0,0.5
RMORE,0.001,0.0005,,,,1000
KEYOPT,3,5,2
KEYOPT,3,9,0
KEYOPT,3,10,1
!Generate the target surface
NSEL，S，NODE，，ke
CM,_TARGET,NODE
TYPE,2
ESLN,S,0
ESURF
!Generate the contact surface
NSEL,S,NODE,,GAN
CM,_CONTACT,NODE
TYPE,3
ESLN,S,0
ESURF
ALLSEL
FINISH