Before you can load an image for debugging, you must connect to the required target. The target can be a simulated target or a hardware target.
See also:
The Connect to Target window
Making a connection from the Connect to Target window
Making a connection from the Home Page
Connections to RTSMs
Connecting to a RealView SoC Designer target
Effect of connecting to a target on the RealView Debugger GUI
Considerations when connecting to targets.