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Mark, It appear that you have the pqact entry correct but i can't check for tabs between the actions.A quick way to check if your parameters are corect is to run the decoder from the command line in the ldm home directory using a raw data file. ie % cd ~ldm % decoders/metar2nc tables/metar.cdl data/netcdf/metarold < "raw data file" it will display the error message. if this doesn't help, let me know. robb.... # metar decoder, creates NetCDF files formated Surface_METAR_yyyymmdd_hh00.nc # All aviation reports including metar tests. old netcdf file format DDS|IDS ^S(A....|P....|XUS8.) .... ([0-3][0-9]) PIPE decoders/metar2nc tables/metar.cdl data/netcdf/metarold # Ticket Details =================== Ticket ID: HGL-863470 Department: Support netCDF Decoders Priority: Urgent Status: Open