I use Vault Workgroup 2014. When I want to run Copy Design I got this error message.
I don`t understand what default project is not set in Inventor.
Solved! Go to Solution.
Set your default Inventor Project File in Tools -> Options -> Inventor Project file.
I forgot to add that this should be done in the Vault Workgroup 2014 Client, not in Inventor.
Start with some of our most frequented solutions or visit the Installation and Licensing Forum to get help installing your software.