[gembud] Old upperair in newer gempak?

I just noticed NSHARP in Gempak 6.2 can't open an old archived upperair .gem 
file from May 1999.

I haven't been paying attention ... 
  - is this a known behavior?  
  - is there a work-around to make this data usable?

Thanks,
-Neil


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Neil Smith  neils@xxxxxxxx   979.845.6272
Comp. Sys. Mngr., Atmospheric Sciences, TAMU