[gembud] GDTOPO

Greetings,

I'm working with creating a grid of 30-sec topography for
approximately the coverage of the US.  GDTOPO works fine and I can use
GDINFO to display the grid within the newly created GEMPAK file.
However, I keep getting an error message saying that the elevation data
does not exist when I use several other programs (eg., GDGRIB2, GDLIST).
 Is there a problem with the size of the domain and grid point spacing
being used?
Is there a way to correct this?

Thank you much,
Chris