ansys 弹簧单元错误提示

ansys分析，加弹簧单元后提示错误：nodes i and j have been defined as duplicate nodes for element 201（combin39）怎么解决啊？
命令流：
nsel,s,loc,x,53
*get,ncount,node,,count
nnow=0
*do,i,1,ncount
nsel,s,loc,x,53
nnow=ndnext(nnow)
cmsel,s,zhuan
nslv,r,1
nnow1=nnow
allsel,all
cmsel,s,shajiang
nslv,r,1
nnow2=nnow
allsel,all
type,3
real,3
e,nnow1,nnow2
type,4
real,4
e,nnow1,nnow2
*enddo