陈育民书上盾构模拟出现shellSEL 1 does not exist错误

fankou

用flac 3d 5.01 练习陈育民书上的盾构例子，
model null range cyl end1 0 a1 0 end2 0 a2 0 rad 3.0
sel shell id=1 range cyl end1 0 a1 0 end2 0 a2 0 rad &
3.0 group tunnel not
sel node local xdir 1 0 0 ydir 0 -1 0 range x -0.1 0.1
sel node fix lsys range x -0.1 0.1
sel node fix x yr zr range x -0.1 0.1
sel node local xdir 0 0 -1 ydir 0 -1 0 range y -0.1 0.1
sel node fix lsys range y -0.1 0.1
sel node fix y xr zr range y -0.1 0.1
sel shell id=1 prop iso=(3.45e10,0.3) thick=0.35 &
density 2450
sel shell apply press -160e3 range cid n1 n2


apply nstress s_press grad 0 0 s_grad range cyl end1 0 &
b1 0 end2 0 b2 0 rad 3.0


set fl off
solve


set fl on
solve age t
出现错误 *** shellSEL 1 does not exist.

求大神帮忙指点！

萌萌滴小鱼

我也想知道这是怎么了？