I keep getting the following error in my code and I can't figure out why. Any help would be appreciated. % XMANAGER: Caught unexpected error from client application. Message follows... % Internal error: Triangulation is invalid. CONTOUR, X, Y, Z, IRREGULAR=1, ISOTROPIC=1, /CLOSED, /CELL_FILL, /OVERPLOT, LEVELS=[ 20,40,60,80,100,120,140,160,180,200,220,240,260,280,300,320,340,360,380,400,420,440,460,480,500,520,540,560,580,600,620,640,660,680,700,720,740,760,780,800,820,840,860,880,900,920,940,960,980,1000] X is my array of data of type double Y is my array of longitudes of type double Z is my array of latitudes of type double each array is 32400 in size. Thank you, Jeff jeff.patrick@computer.org