LAS/Ferret Image Display Issue

[Mark A Ohrenschall <Mark.A.Ohrenschall@xxxxxxxx>]

  Symbol not found
  %range 'PPL$ZMIN' 'PPL$ZMAX' 30
          ^
  Symbol not found
  set PPL$RANGE_INC2 'PPL$RANGE_INC' * 2
Hello,

What do the above messages mean (gotten from log/GenericLAS_debug.txt)? This message corresponds to requesting a GIF from LAS and seeing only the NOAA/PMEL TMAP Ferret Ver 5.40 logo at the top and nothing else (not even a data set or variable title).

Thanks,

Mark