Care should be taken if the number of gridpoints is changed, in particular if you plan on accessing the higher resolution mesoscale grids when they become available, or if you are generating large grids locally using output from models such as ARPS and MM5. This value also effects the Nprogs. When NTL is launched it reports on the number of colors requested, and available to the system. If the system is unable to return the number of colors requested, the programs exit. You can decrease the number of colors used by nprogs by using the NTL command line options.
Some window systems reserve more colors for thir own use, thereby allowing programs fewer choices.
If you typically experience problems with other applications getting all the colors they ask for, or if you typically have several color intensive applications such as web browsers, image viewers, and Gempak running at the same time, you may want to set the Maximum number of colors used by Gempak to a lower value.