diagonal cross section

[Patrick Pyle]

Users,

I am attempting to display a diagonal cross section within a model output
domain.  When I use this:

set lat start end
set lon start end
set lev start end
d var

I get an error message:

Operation error: Invalid dimension environment
Looping dimension does not vary.

I then tried:

set looping on
set loopdim y
set lat start end
set lon start end
set lev start end
d var

This provided the cross section; however, I would rather time to vary rather
than the lat and/or lon values.  I am aware that the default loopdim is "t"
but I get the same Operation error has before when I attempt to use the default.

Any advice? or is there any other way I can create this plot without using
the looping command?

Thanks in advance!