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<p class="MsoNormal">Hello NCL Talk,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">First time poster, long time user!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a script that reads in GFS files via OPeNDAP within a do loop that reads in variables and plots PNGs for each 6-hour forecast period. Here are some critical lines:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:.5in;text-indent:4.5pt">fhr = (/0,6,12,18,24,30,36,42,48,54,60,66,72,78,84,90,96,102,108,114,120,126,132,138,144,150,156,162,168,174,180,186,192,198,204,210,216,222,228,234,240,252,264,276,288,300,312,324,336,348,360,372,384/)<o:p></o:p></p>
<p class="MsoNormal"> nfhr = dimsizes(fhr)<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"> do fhri=1,40<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal" style="text-indent:.5in"> if fhr(fhri) .le. 240 then<o:p></o:p></p>
<p class="MsoNormal" style="text-indent:.5in">filename = "http://nomads.ncep.noaa.gov:9090/dods/gfs_0p50/gfs20"+filey+filem+filed+"/gfs_0p50_"+fileh+"z"<o:p></o:p></p>
<p class="MsoNormal"> a = addfile(filename,"r")<o:p></o:p></p>
<p class="MsoNormal"> end if<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The loop will run no problem sometimes for hundreds of iterations in various regions but eventually will get tripped up when reading in data:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> precip = a->apcpsfc ({curdate},{latMin:latMax},{lonMin:lonMax})<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">fatal:NclOneDValGetClosestIndex: Non-monotonic coordinate value being used, can't complete coordinate subscript<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">fatal:Could not obtain coordinate indexes, unable to perform subscript<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Lucida Console"">fatal:["Execute.c":8575]:Execute: Error occurred at or near line 574 in file 12hPrecipDiff_Total_GFS.ncl<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I will re-run the same exact script and it will process that same exact iteration before getting tripped up at another seemingly random timestep within the loop. I’ve tried sleeping for 2 seconds between loops and deleting as many variables
as possible but still get random breakdowns.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any ideas much appreciated!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Cheers,<o:p></o:p></p>
<p class="MsoNormal">Adam Turchioe<o:p></o:p></p>
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