! err686_cancel_invalid_var
! ticket 2159
! (Note that the shade of a one-cell or less region is
!  allowed fully as of Ferret v7.1.  See ticket 2494)

! The cancel variable ran into an incorrect setting 
! for variable-in-memory 

set mode ignore
let b = 1
shade b

set mode/last ignore
cancel var b

! Shade plot of a less-than-one cell region. Its where the bug came from.
use coads_climatology
shade/x=161.1:161.3/y=0.2:0.4/L=1 sst

