Hi In the file http://mulucaves.org/Api_Chamber.zip you will find a the therion files for a large chamber. I was trying to fill it with blocks, and came up with this error average distortion: 0.52% writing Api_Chamber.pdf ... ####################### metapost log file ######################## This is MetaPost, Version 0.641 (Web2c 7.5.2) (mem=mpost 2004.3.2) 4 MAY 2006 20:01 **data.mp (data.mp [4001] [4002] [4003] [4004] [4005] ! MetaPost capacity exceeded, sorry [main memory size=3000001]. <for(1717.52426)> ...t((path)intersectiontimes.qq) <0:thclean.qq;thdraw.qq;fi... <for(90.11911)> ...:thclean.qq;thdraw.qq;fi;endfor ; ENDFOR <argument> ...hclean.qq;thdraw.qq;fi;endfor;endfor ; image->...ture;currentpicture:=nullpicture;(TEXT2) ;currentpicture.endgroup a_blocks->...clean.qq;thdraw.qq;fi;endfor;endfor;) ;clip.tmp_pic.to(EXPR0);dr... l.3228 ))) ; If you really absolutely need more capacity, you can ask a wizard to enlarge me. which means little to me. I defined it as one area as last time the joins did not look good last time I tried. (sorry if this is better now) but before I go to the trouble of splitting it all up, will that solve the problem, or will there still be some size issue. It ran fine without the area in. I am using win2000 and 0.3.10 thanks Andrew