[gradsusr] Hello to all users of Grads

[avi kojokro]

I have a script that Runs on Grads  But somehow when it comes to the
thickness 1000-500 He stops and writes me an error.
Can someone help me understand why there is this mistake, because I could
not find a mistake.
I am attaching the script, as well as a screenshot of the error in the
window of Gards.
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'reinit'
'reset'
'sdfopen http://nomad1.ncep.noaa.gov:9090/dods/reanalyses/reanalysis-2/month/pgb/pgb'
'set lat 32.5'
'set lon 35.0'
tt=''
'set time 1JUL2014'
'q time'
say ' 'result
*'set gxout print'
'set lev 250'
'd tmpprs-273.16'
tt1=subwrd(result,4)
tt=tt' 'tt1
say t250 ' 'result


'set lev 500'
'd tmpprs-273.16'
tt1=subwrd(result,4)
tt=tt' 'tt1
say t500 ' 'result


'set lev 700'
'd tmpprs-273.16'
tt1=subwrd(result,4)
tt=tt' 'tt1
say t700 ' 'result


'set lev 850'
'd tmpprs-273.16'
tt1=subwrd(result,4)
tt=tt' 'tt1
say t850 ' 'result


'set lev 1000'
'd tmpprs-273.16'
tt1=subwrd(result,4)
tt=tt' 'tt1
say t1000 ' 'result


'set lev 1000'
'd rhprs'
tt1=subwrd(result,4)
tt=tt' 'tt1
say rh1000 ' 'result


'set lev 500'
'd hgtprs'
tt1=subwrd(result,4)
tt=tt' 'tt1
say h500 ' 'result


'set lev 700'
'd hgtprs'
tt1=subwrd(result,4)
tt=tt' 'tt1
say h700 ' 'result


'set lev 850'
'd hgtprs'
tt1=subwrd(result,4)
tt=tt' 'tt1
say h850 ' 'result


'set lev 1000'
'd presmsl/100'
tt1=subwrd(result,4)
tt=tt' 'tt1
say slp ' 'result
	



'set lev 1000'
'd hgtprs(lev=500)-hgtprs(lev=1000)'
tt1=subwrd(result,4)
tt=tt' 'tt1
say thickness1 ' 'result



'set lev 1000'
'd hgtprs(lev=850)-hgtprs(lev=1000)'
tt1=subwrd(result,4)
tt=tt' 'tt1
say thickness2 ' 'result


'set lat 30.0'
'set lon 35.0'
'set lev 850'
'd tmpprs-273.16'
tt1=subwrd(result,4)
tt=tt' 'tt1
say  dt850 ' 'result


'set lev 1000'
'd tmpprs-273.16'
tt1=subwrd(result,4)
tt=tt' 'tt1
say  dt2m ' 'result














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