<div dir="ltr"><div><font face="arial, sans-serif">Wesley solved this problem for me.... I did the bold line of code below in his response to convert the file to a format readable by gribmap and it worked flawlessly. I didn't even have to recompile, my existing wgrib2 worked just fine.</font></div><font face="arial, sans-serif"><div><font face="arial, sans-serif"><br></font></div>Per Wesley <span style="color:rgb(31,31,31)">Ebisuzaki at NOAA:</span></font><div><br></div><div><div class="gmail_default">ECMWF has started distributing files using AEC compression.  GrADS/gribmap use</div><div class="gmail_default">NCEP's g2clib for reading grib2. AFAIK g2clib doesn't support AEC compression.</div><div class="gmail_default"><br></div><div class="gmail_default">The work around is to get a version of wgrib2 that was built with AEC support.</div><div class="gmail_default">The default build doesn't include AEC support because it requires a recent</div><div class="gmail_default">version of CMake to build.  Once you get a version of  wgrib2 with AEC support,</div><div class="gmail_default">you convert the file from AEC compression to something that GrADS supports.</div><div class="gmail_default"><br></div><div class="gmail_default">   <b>wgrib2 IN.grb -set_grib_type c3 -grib_out OUT.grb</b></div><div class="gmail_default"><br></div><div class="gmail_default">Unfortunately not all sites support CMake.  For example, CMake is not</div><div class="gmail_default">available on CPC local workstations.</div><div class="gmail_default"><br></div><div class="gmail_default">I am not aware of any efforts to add AEC support to g2clib.</div><div class="gmail_default"><br></div><div class="gmail_default">Wesley</div><div class="gmail_default"><br></div><div class="gmail_default">PS  building wgrib2</div><div class="gmail_default"><a href="https://geotrack.email/ext/l?idx=quKrbNPRrLCJcODnKcWv&ret=https%3A%2F%2Fwww.cpc.ncep.noaa.gov%2Fproducts%2Fwesley%2Fwgrib2%2Fcompile_questions.html" target="_blank">https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/compile_questions.html</a></div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr" style="font-size:small">Andrew Revering</div><div dir="ltr" style="font-size:small">Convective Development, Inc.<br><div><span style="font-size:12.8px">dba F5Weather</span></div><div>Minneapolis, MN USA<span style="font-size:12.8px"><br></span></div><div><a href="https://geotrack.email/ext/l?idx=quKrbNPRrLCJcODnKcWv&ret=http%3A%2F%2Fwww.f5weather.com%2F" style="color:rgb(17,85,204)" target="_blank">http://www.f5weather.com/</a></div></div></div></div></div><br><div><div><table border="0" cellpadding="8" cellspacing="0"><tbody><tr id="m_-9058100891220814463trSig"><td style="vertical-align:middle;padding:0"><a href="https://geotrack.email/?utm_source=gmail&utm_medium=signature&utm_campaign=viralSignature" style="text-decoration:none" target="_blank"><img src="https://geotrack.email/img/icon32.png" alt="GeoTrack" width="24" height="24" style="margin-top:5px"></a></td><td style="vertical-align:middle;padding-left:3px"><span style="color:#777">Sender notified with</span> <a href="https://geotrack.email/?utm_source=gmail&utm_medium=signature&utm_campaign=viralSignature" style="color:#b22222" target="_blank">GeoTrack</a></td></tr></tbody></table></div></div></div><div><div class="geotrack-signature"><table border="0" cellpadding="8" cellspacing="0" style="user-select:none;"><tbody><tr id="trSig"><td style="vertical-align:middle;padding:0"><a href="https://geotrack.email/?utm_source=gmail&utm_medium=signature&utm_campaign=viralSignature" style="text-decoration:none"><img src="https://geotrack.email/img/icon32.png" alt="GeoTrack" width="24" height="24" style="margin-top:5px;"></a></td><td style="vertical-align:middle;padding-left:3px"><span style="color:#777">Sender notified with</span> <a href="https://geotrack.email/?utm_source=gmail&utm_medium=signature&utm_campaign=viralSignature" style="color:#b22222" class="geoLink">GeoTrack</a></td></tr></tbody></table></div></div><img class="trackfx" height="0" width="0" alt="12" title="tfx-quKrbNPRrLCJcODnKcWv-dG9ybmFkb2VzQGdtYWlsLmNvbQ==" src="https://geotrack.email/ext/quKrbNPRrLCJcODnKcWv.png?gtk=dG9ybmFkb2VzQGdtYWlsLmNvbQ%3D%3D"></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 28, 2023 at 9:46 AM Brian Gaze <<a href="mailto:brianw.gaze@googlemail.com" target="_blank">brianw.gaze@googlemail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">ECMWF has changed the encoding used in GRIB2 products as part of the recent upgrade. This appears to cause a problem for Gribmap, for example:<div><br></div><div>gribmap -i 81_2mtemp.grib.ctl<br></div><div><br></div><div>Returns:</div><div><br></div><div>gribmap: scanning GRIB2 file: 81_2mtemp.grib<br>getdrstemplate: DRS Template 5.42 not defined.<br>gribmap: ERROR! g2_getfld failed: ierr=12<br></div><div><br></div><div>This is gribmap for GrADS Version 2.1.a2.oga.1</div><div><br></div><div><br></div><div>Does anyone know a workaround or solution to this?</div><div><br></div><div>Brian </div></div>
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