Hi everyone: With IDL 8.0-32bit, the following program does not show the filled contour over map. But with IDL 7.1, this program runs successfully. I analized this code, and found that remove the "LIMIT=[17.0000, 0.0000, 55.0000, 140.000]" of map_set, this program shows the filled contour. (ps, this code also runs successfully with IDL 8.0-64bit version). So where are the problems? Thanks. pro test_map_contour ; Make a 10 degree latitude/longitude grid covering the Earth: lat = REPLICATE(10., 37) # FINDGEN(19) - 90. lon = FINDGEN(37) # REPLICATE(10, 19) ; Convert lat and lon to Cartesian coordinates: X = COS(!DTOR * lon) * COS(!DTOR * lat) Y = SIN(!DTOR * lon) * COS(!DTOR * lat) Z = SIN(!DTOR * lat) ; Create the function to be plotted, set it equal ; to the distance squared from (1,1,1): F = (X-1.)^2 + (Y-1.)^2 + (Z-1.)^2 ; Create a plotting window WINDOW, 0, TITLE='Mollweide Contour' device,decomposed=0 loadct,13 ;MAP_SET, /stereographic, 0, 0, /ISOTROPIC, $ ; /HORIZON, /GRID, /CONTINENTS, $ ; TITLE='Mollweide Contour' MAP_SET, 90, 106., LIMIT=[17.0000, 0.0000, 55.0000, 140.000], $ /NOBORDER, /STEREOGRAPHIC CONTOUR, F, lon, lat, NLEVELS=12, c_colors=indgen(12)*20,$ /OVERPLOT, /DOWNHILL, /FOLLOW, /cell_fill map_continents end