ansys求助

Modification of an optimization variable (DV, SV or OBJ) has forced a
partial clear of your optimization data. Design sets and global
optimization settings are unchanged, but all other data has been
initialized. 这个警告怎么回事啊 弄了好久没弄明白程序怎么回事
程序如下
FINISH
/CLEAR
/FILNAME,ZUOYE
/TITLE,NO6
*CREATE,SCRATCH
A1=0.002
A2=0.002
disp=0.003
/PREP7
mp,prxy,1,0.3
ET,1,LINK1
R,1,A1
R,2,A2
MP,EX,1,2E11Y
N,1,1.44,0.72
N,2,1.44
N,3,0.72,0.72
N,4,0.72
N,5,,0.72
N,6
REAL,1
E,1,2
E,1,3
E,6,4
E,2,4
E,3,4
E,3,5
REAL,2
E,1,4
E,3,2
E,4,5
E,3,6
FINISH
/SOLU
D,5,UX
D,5,UY
D,6,UX
D,6,UY
F,2,FX,6E5
F,2,FY,-9E5
F,4,FY,-6E5
SOLVE
FINISH
/POST1
SET,LAST
NSORT,U,Y,,1
*GET,DISP,SORT,,MAX
disp=abs(disp)
ETABLE,EVOL,VOLU
SSUM
*GET,VTOT,SSUM,,ITEM,EVOL
RHO=7.8E3
WT=RHO*VTOT
ETABLE,SIG,LS,1
*GET,SIG1,ELEM,1,ETAB,SIG
*GET,SIG2,ELEM,2,ETAB,SIG
*GET,SIG3,ELEM,3,ETAB,SIG
*GET,SIG4,ELEM,4,ETAB,SIG
*GET,SIG5,ELEM,5,ETAB,SIG
*GET,SIG6,ELEM,6,ETAB,SIG
*GET,SIG7,ELEM,7,ETAB,SIG
*GET,SIG8,ELEM,8,ETAB,SIG
*GET,SIG9,ELEM,9,ETAB,SIG
*GET,SIG10,ELEM,10,ETAB,SIG
SIG1=ABS(SIG1)
SIG2=ABS(SIG2)
SIG3=ABS(SIG3)
SIG4=ABS(SIG4)
SIG5=ABS(SIG5)
SIG6=ABS(SIG6)
SIG7=ABS(SIG7)
SIG8=ABS(SIG8)
SIG9=ABS(SIG9)
SIG10=ABS(SIG10)
*END
*USE,SCRATCH
/ESHAPE,2 !以实体单元模式显示壳单元
/VIEW,1,1,1,1 !轴测视图
EPLOT 　 !画单元
/OPT
OPANL,SCRATCH
OPVAR,A2,DV,0.003,0.01
OPVAR,A1,DV,0.003,0.01
OPVAR,disp,SV,,0.005
OPVAR,SIG1,SV,,125E6
OPVAR,SIG2,SV,,125E6
OPVAR,SIG3,SV,,125E6
OPVAR,SIG4,SV,,125E6
OPVAR,SIG5,SV,,125E6
OPVAR,SIG6,SV,,125E6
OPVAR,SIG7,SV,,125E6
OPVAR,SIG8,SV,,125E6
OPVAR,SIG9,SV,,125E6
OPVAR,SIG10,SV,,125E6
OPSAVE,trussvar,opt !存储数据
OPVAR,WT,OBJ,,,2 !定义目标函数
OPTYPE,first !定义1阶方法
OPFRST,30 !最大30次迭代
OPEXE
STATUS
OPLIST,ALL
/AXLAB,X,ITERATION NUMBER
/AXLAB,Y,STRUCTURE WEIGHT
PLVAROPT,WT
/AXLAB,Y,DEFELECTION
/AXLAB,Y,CROSS-SECTIONAL AREA
PLVAROPT,A1,A2