anasys优化问题

在优化run的时候，出现错误User Interface mode is already on. Command ignored.请问这是为什么呢，是按照书本来做的
/TITLE,RACK UNDER SELF-WEIGHT
/PREP7
*SET,AREA,50
ET,1,LINK8
R,1,AREA, ,
MP,EX,1,2.07E5
MP,PRXY,1,0.3
*DO,I,1,6,1
N,I,0,(I-1)*1000,0
*ENDDO
NGEN,6,6,ALL,,,1000,0,0
*DO,I,37,41,1
N,I,500,(I-37)*1000+500,-700
*ENDDO
NGEN,5,5,37,41,1,1000,0,0
TYPE,1
MAT,1
REAL,1
*DO,I,1,31,6
*DO,J,1,5,1
E,I+J-1,I+J
*ENDDO
*ENDDO
*DO,I,1,30,1
E,I,I+6
*ENDDO
*DO,I,37,57,5
*DO,J,1,4,1
E,I+J-1,I+J
*ENDDO
*ENDDO
*DO,I,37,56,1
E,I,I+5
*ENDDO
*DO,I,37,57,5
*DO,J,1,5,1
E,I+J-1,1.2*I-43.4+J-1
E,I+J-1,1.2*I-43.4+J
E,I+J-1,1.2*I-43.4+J+5
E,I+J-1,1.2*I-43.4+J+6
*ENDDO
*ENDDO

NSEL,S,LOC,X,0
NSEL,A,LOC,X,5000
NSEL,A,LOC,Y,0
NSEL,A,LOC,Y,5000
D,ALL,,,,,,ALL,,,,,
NSEL,ALL
NSEL,S,LOC,Z,-700
F,ALL,FZ,-10000
NSEL,ALL
FINISH
/SOLU
ANTYPE,0
/STATUS,SOLU
SOLVE
FINISH
/POST1
AVPRIN,0,0,
ETABLE,evolume,VOLU,
SSUM
*GET,volume,SSUM, ,ITEM,EVOLUME
AVPRIN,0, ,
ETABLE,smax_e,LS, 1
ESORT,ETAB,SMAX_E,0,1, ,
*GET,smaxe,SORT,,MAX
*GET,dzmax,NODE,49,U,Z
*SET,dmax,-dzmax
LGWRITE,'optimize','txt','C:\Users\Administrator\',COMMENT
FINISH
/OPT
OPANL,'optimize','txt',' '
OPVAR,AREA,DV,20,200,0.01,
OPVAR,SMAXE,SV,200,210,0.01,
OPVAR,DMAX,SV,0.1,10,0.01,
OPVAR,VOLUME,OBJ, , ,20000,
OPTYPE,FIRS
OPFRST,100,100,0.2,
OPEXE