Welcome to the forum. Your post is still flagged as "This post has NOT been accepted by the mailing list yet", so nobody gets it unless they look. Hence why this reply took so long. You need to subscribe to the mailing list <http://forum.openscad.org/mailing_list/MailingListOptions.jtp?forum=1> , and respond to the registration email. Your code works ok on the latest release 2015.03-2 (64 bit on Windows), if you're not on the latest <http://www.openscad.org/downloads.html> try it. p.s. $fn=200 is rather high and has a performance hit, try smaller (~20) values initially, use a high (~60) one when producing your final result. ----- Admin - PM me if you need anything, or if I've done something stupid... Unless specifically shown otherwise above, my contribution is in the Public Domain; to the extent possible under law, I have waived all copyright and related or neighbouring rights to this work. Obviously inclusion of works of previous authors is not included in the above. The TPP is no simple “trade agreement.” Fight it! http://www.ourfairdeal.org/ time is running out! -- View this message in context: http://forum.openscad.org/Simple-file-causes-crash-on-Windows-8-tp17779p17806.html Sent from the OpenSCAD mailing list archive at Nabble.com.