>Have an application written in 2.6 that I'm slowly, but surely converting to Visual. Created a Database and have added my tables into it. When I choose the index of the main table and drag it to one of the other tables that it needs to be related to, it get an error, "Uniqueness of Index INDEXNAME is violated." What is this error and what is the solution?

Sounds like you have created a Primary Key or Candidate Key that is getting a duplicate. By definition, both MUST be totally unique. For more information, see the KB article on my website.