求助，画卫星云图tbb总是出错，是循环的问题吗？

ITCZ

t=1
while(t<=168)
'clear'
'set t 't
'q time'
m_time=subwrd(result,3)
'set grads off'
'set grid off'
'set gxout shaded'
'set ccols 1 2 3 11 0'
'set clevs -60 -50 -32 -20'
*'set cmax -10'
'd tbb+100-273.15'
*'cbarn'
'set gxout contour'
'set cstyle 1'
'set clevs -60 -50 -32 -20 -10'
'd tbb+100-273'

*第一次
'q w2xy 123.60 32.99'
x1=subwrd(result,3)
y1=subwrd(result,6)
'q w2xy 119.86 45.00'
x2=subwrd(result,3)
y2=subwrd(result,6)
'set line 1 1 10'
*'draw line 'x1' 'y1' 'x2' 'y2''

*第二次
'q w2xy 126.97 31.99'
x3=subwrd(result,3)
y3=subwrd(result,6)
'q w2xy 122.95 45.00'
x4=subwrd(result,3)
y4=subwrd(result,6)
'set line 1 1 10'
'draw line 'x3' 'y3' 'x4' 'y4''

'set mpdset hires'
'set mpdset cnworld cnriver'
'set map 1 1 6'
'draw map'
'enable print d:\zkx\tbb.gmf'
'draw title TBB,'m_time
'print'
t=t+1
endwhile
'disable print'