You have not caused any problem so there is no need to apologise, it is great to see new folk trying to help.
Not wishing to double post [I have said this in other Posts] I always attempt to resolve every problem raised in the Forum, it is a great way to improve skills.
On this occasion my knowledge is inadequate because I do not have any need or interest directly in 3D Printing, although hoping to make contact with a 3D Printer User interested in Printing Screw Threads.
Because the OP mentioned an inability to Post the Model it was assumed that this is likely due to running the Free Version of S3D. While Pro Version Users can send Models to the S3D Team for investigation the understanding is the eMail Support is limited to Pro Users. However by the the OP wishing to Post the Model it seemed likely that the alternative may be acceptable, simply a choice for the OP to make?
If you consider it helpful it is easy to ‘direct’ your responses by typing ‘@’, without the quotations, and a list of Participants in the discussion will pop up. Simply click on the appropriate entry.