求教，循环错在哪里

jiuzhegele

/filname,lubangshiyan
/title,lubangshiyan
/PREP7

keyw,pr_therm,1
ET,1,PLANE55
MP,KXX,1,1
W0=1
blc4,,, W0,1
LESIZE,ALL, , ,10, ,1, , ,1,

ASEL, , , ,
1
AMESH,1
SAVE
FINISH

/SOL
sfl,2,conv,1,,100
sfl,4,conv,1,,0
allsel

SOLVE

FINISH

/POST1

PLNSOL, TEMP,, 0

/PREP7
T0=TEMP(12)
AA=T0-60
*Dowhile,AA
WB=(T0-60)/40
W1=W0-WB
SFLDELE,2,CONV
SFLDELE,4,CONV
ACLEAR,1
aplot,all
ADELE,1, , ,1
NUMCMP,LINE
NUMCMP,AREA
blc4,,, W1,1
LESIZE,ALL,, ,10, ,1, , ,1,

ASEL, , , ,
1
AMESH,all
SAVE
FINISH

/SOL
sfl,2,conv,1,,100
sfl,4,conv,1,,0
allsel

SOLVE

FINISH

/POST1

PLNSOL, TEMP,, 0
W0=W1
T0=TEMP(12)
AA=T0-60
*enddo
上面循环中，为什么只能进行两次运算？各位高手，能提示下 吗？