For a couple of years now I've been able to plot the Great Lakes wave
forecasts in NMAP2, which is available from the GLERL ftp site. But since
the release of Gempak 5.8.x, I've been getting an error when plotting the
data in NMAP2. The error I receive is "[Gemplt] NIPBND - Invalid projection
[DG-37] No reference grid navigation is set in GPLT"
I made the prerequisite changes to the grid tables and Datatype.tbl, as I
have done in 5.6x and 5.7x, but for some reason I'm getting this strange
error and it really has me stumped.