2018 trying to export to Acad 2010, bug splat

[millerjx]

I have tried multiple times. Shut everything down restarted. I keep getting a Splat. I am running a PC.
Splat thinks I have attached a .pdf. I have not. It also thinks I am running Mac, I am not.

How can I get this set exported?

I can't seem to attach the LO file. Maybe too big? 40Mb

Thank you in advance