! err693_lev_nv_over.jnl
! The polygon command with /LEV=20V caused a crash; levels settings incorrect.

! draw any underlay to set up for polymark script
use coads_climatology
shade/x=120:250/Y=25s:65n/L=1/pal=white/nokey sst

LET xpts = 180 + 50*COS(2*3.14*I[I=1:50]/60)
LET ypts = 15  + 20*SIN(2*3.14*I[I=1:50]/60)

! Variable is a constant w/ negative value
LET sst = -5 + 0*ypts

! The poly/over command caused a Fortran runtime error in tm_fmt_sngl
GO polymark polygon/over/lev=20v/key/title="SST"  xpts,ypts,sst,square, 0.5
