ga-> !g2ctl D:/fnl > D:/fnl.ctl
Can't spawn "cmd.exe": No such file or directory at C:\Program Files (x86)\OpenGrADS\Contents\Cygwin\Versions\2.0.1.oga.1\i686\g2ctl.exe line 238.
Big problem:
either D:/fnl is missing or not a grib file
or wgrib2 is not on your path or wgrib2 is too old.