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Robert, For dcgrib2, in dcwppg.c, pdsextflag is set to true, to always add the ensemble extension. There is no undocumented flag to the contrary. Steve Chiswell On Thu, 2004-01-15 at 13:22, Robert Mullenax wrote: > There is a -z switch in dcgrib that allows one to turn off the ensemble PDS > extension, > but help dcgrib2 doesn't show that as an option in dcgrib2. Is there an > undocumented > option in dcgrib2 that will let you do that? > > Thanks, > Robert > > Robert Mullenax > Weather Systems Administrator > Universal Weather and Aviation