拓扑优化遇到的问题

Glin

我是按照《有限元分析软件-ANSYS融会贯通》（中国水利水电出版社2002版）上的例子做的。书上附带的命令流是：
/TITLE,RECTANGULAR PLATE
/PREP7
ET,1,SHELL93
R,1.0,0.02
MP,EX,1,2.0E8
MP,NUXY,1,0.3
K,1
K,2,1
K,3,1,1
K,4,,1
A,1,2,3,4
LSEL,,LINE,,1,4
LESIZE,ALL,,,20,,,,,1
MSHAPE,0,2D
MSHKEY,0
AATT,1,1,1,
AMESH,ALL
FINISH
/SOLU
DL,4,,ALL
FK,2,FY,-100
FK,3,FX,100
SAVE
TOCOMP,SCOMP,SING,1
TOVAR,SCOMP,OBJ
TOVAR,VOLUME,CON,50
TOTYPE,OC
TODEF,0.0001
TOLOOP,20,0
FINISH
TOPLOT
TOGRAPH,OBJ
但是我做完后却出现了一个warning：since RSYS,SOLU is in effect,the PLNS command will result in a FULL graphics plot.
请问高人这该怎么办？谢谢啊