Hi again!
Well, I think this time it's really a problem of a weirdo conversion during import from some other format to .ac (I must be right this time!
)
The flightdesk.ac has more than 12000 (!) groups/objects in it, with these "more than 12000" - 45 of them being empty (in .acs, you can 'group' several objects, which become 'kids' then, and can have 'kids' again and so on...).
When I open that file in AC3D, it renders fine, when I go to "Hierarchy View" (a simple list of groups/objects), AC3D breaks down. So I guess, this is a huge problem for the import script as well.
After I have saved only the 45 "correct" objects into a new file, file size went from 2Mb to 270kb, so I could send you that file and you could try again to import.
If again Woodstokk's theory of invalid characters is right (no, not this time!), then the importer error may have been caused by the object name 'belowG/S.002' - note the "/" in the name.
Ciao,
Adrian