Hi.

I packaged my mod with Archive.exe.

How do I upload the .rar to the Steam workshop?

It looks like it automatically detects the BSA, that's nice.

However, I keep getting "error 16" trying to upload it.

Am I doing something wrong?

You do not upload a .rar file to Steam, you must open the ck and it will upload the esp and the bsa on Steam for you. See details here: http://www.creationkit.com/Uploading_To_Steam_Workshop

Given the fact that you have already created your archive, the ck will locate it automatically.

Oh Wow. This is working now. Thanks!