bug in mp_graticule

[Muyin Wang <muyin.wang@xxxxxxxx>]

Hi, Ansley:
I am trying to use stereographic_north projection to do some contour
plots. When the plot is done, I'd like to add "mp_graticule" to the plot.
However, the mp_graticule works for 3D data or 2D data, but not the ones I
extracted of a 2D data with z=1 dimension from a 3D data set.
The error message looks like this:

**ERROR: illegal limits: "K" is not in the range K=2
          Axis extremes are K=1
DEFINE VARIABLE/quiet mp_xaxdel = mp_xdel/`k`
Command file, command group, or REPEAT execution aborted

Is there a way to work around this?
Thanks,
Muyin