https://bugs.winehq.org/show_bug.cgi?id=39285
--- Comment #5 from Ted Hansen tedhansen@sasktel.net --- I don't think this was a damaged winetricks file.
There actually was a repeatable bug which caused ACAD14 to not recognize some commands, notably "RENDER", and inserting file types such as "IMAGE" & "3DSIN".
I tested wine 1.4, 1.6.1, 1.6.2, 1.7.18 and 1.7.50 using clean copies (brand new installs) of ubuntu 12.04 and 14.04.
The ~.wine folder was always deleted between each trial so that each test was a clean install of that wine version.
Always I got the "unable to register" error while installing ACAD 14 and on all wine versions tested prior to 1.7.50 the commands noted above returned an "unrecognised command" message.
On ubuntu 14.04 using wine 1.7.50 the commands worked even though the install still gave the error message.
Each trial was repeated more than once.