本人在網上看了一段空間桁架建模的學習視頻，將里面的APDL代碼抄下來運行的時候報錯

APDL代碼如下：

finish

/clear

/prep7

et,1,link180

r,1,300

mp,ex,1,2e5

mp,prxy,1,0.3

k,1

k,2,3000

k,3,3000,3000

k,4,0,3000

l,1,2

l,2,3

l,3,4

l,4,1

l,1,3

l,4,2

lsel,s,loc,x,0.001,3000

lgen,4,all,,,3000

allsel,all

nummrg,all

numcmp,all

k,11,3000,0,3000

l,1,11

l,2,11

l,11,5

lsel,s,loc,z,0.001,3000 

lgen,2,all,,,6000

nummrg,all

numcmp,all

k,13,6000,0,3000

l,5,13

l,11,13

l,13,12

lsel,s,loc,z,0.001,3000

lgen,2,all,,,,3000

nummrg,all

numcmp,all

lsel,s,loc,x,3000,9000

lsel,r,loc,z,0

lgen,2,all,,,,,3000

allsel,all

lovlap,all

lglue,all

allsel,all

latt,1,1,1

lesize,all,,,1

lmesh,all

nummrg,all

numcmp,all

allsel,all

/solu

dk,1,all,0

dk,4,all,0

dk,9,all,0

dk,10,all,0

fk,2,fz,-100

fk,5,fz,-125

allsel,all

solve