Gene, This does sound strange. I'm on 15.5.1 (610) and I can't reproduce your problem. In the Global Parameters I can change from 4x00 to 6x00 to RS274X and back and forth etc. and nothing happens to my existing top shapes. I would say make sure you go through Database check, make sure there are no shapes out of date etc. Then if it is still happening, try deleting the shape (is it just one?) and creating it again. If it still does not fix the problem, it may be time for some professional help! (as in Cadence, but you still might need the other type by this time!). Good luck, Gary E. MacIndoe PCB Design Engineer Advanced Micro Devices Longmont, Colorado _____ From: icu-pcb-forum-bounce@xxxxxxxxxxxxx [mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Gene Carman Sent: Tuesday, July 18, 2006 4:33 PM To: icu-pcb-forum@xxxxxxxxxxxxx Subject: [PCB_FORUM] Odd fill problem, different gerber styles work... Very simple board... small, 4 layers. Using 15.2 Fill is on, and is dynamic. With the Global parameters set to Gerber 4x00, the fill and voids show up and the fill fills. Works fine. Change the Global parameters to Gerber 6x00 and the fill works fine, the boundry is visible and all is well. Change to 274X and the fill, only on the top layer, suddenly goes away. (the other layers work fine) The boundry data is still present, I can see the outlines and the voids, but there is now no fill. Worst yet, now, when I go to artwork parameters... I am prompted to update the fill... which does nothing, it reports just fine, it just is not there. And of course I cannot go on as the artwork says fill needs to be updated. Fill fails for anything except Gerber 4x00 or 6x00. Anybody have a clue as to what the key might be here? Strange one I tell ya. Very strange.