Head scratcher. I’ve downloaded step files of fasteners from partcommunity.com as STEP AP214 files. Either by double-clicking the file to open in Rhino directly, or the long way round by opening Rhino and ‘import’, or else ‘open’, none of the models appear. Actually, going through ‘import’ or ‘open’, the command stays stuck at the ‘Open’ button. File properties (in Windows Explorer) don’t show any read-only problem. It may well be a problem with the files or the site though, as other step files will open ok. Unfortunately I can’t find these particular UNC csk screws I’m trying to use, online anywhere else. I did try downloading from two different parts suppliers on the partcommunity.com site though. So may be it’s a site problem (?). Or am I missing a trick?
(None of the following should matter, but for diagnostic elimination: STEP import is enabled in Rhino. My Rhino 6 is latest update. W10 did just do some kind of massive update to build 19041 a few hours ago - but all else seems ok when working in Rhino since that.)