Hi Sebastian, 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. You need to subscribe to the mailing list <http://forum.openscad.org/mailing_list/MailingListOptions.jtp?forum=1> , and respond to the registration email. Import()ing multiples should be no problem. It is possible that the stl file is non-manifold or has other issues. If you upload it I can check it for you or you can try downloading netfabb basic <http://www.netfabb.com/basic.php> or use netfabb cloud <https://netfabb.azurewebsites.net/> to check it. ----- Newly minted 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/import-stl-file-multiple-times-tp15194p15200.html Sent from the OpenSCAD mailing list archive at Nabble.com.