Code Map not working in VS2012

Question

I try to generate a Code Map for my solution but it blows up saying: Unable to connect to the specified database.

Specifically, it's trying to connect to (LocalDB)\v11.0

Why does it blow up and why does it need to connect to a DB?

Answer 1

Somehow LocalDb was not installed - typically it gets installed with VS 2012. So I installed SQL Server Data Tools for VS2012, which also installed LocalDb

Answer 2

Visual Studio uses a code index database to help store and create the code maps.