Back in 2012, Navisworks introduced the # symbol in the name of the Navisworks generated NWC files to help differentiate between NWC created via an export. (see this post)
Well, it looks like that has changed in 2013 and has gone back to the pre-2012 way of doing things. I was Appending in a Revit 2013 file and checked the generated NWC file…no # symbol. So I did the same thing with a DWG, and again, no # symbol in the NWC name. It’s very interesting that the addition of the # symbol only lasted a year.
Hopefully I can get some clarification on why this change was made and will report back with what I find. Thanks Lee from Beyond Design for commenting on why the # symbol was removed and a little clarification on why it was introduced in the first place.