Route refers to a known controller

Route refers to a controller registered with the main module or one of its dependent modules

CheckId	NG1010801
TypeName	RouteRefersToAKnownController
Severity	CriticalError
Type	Route

Resolution

When defining routes, you can specify a controller that should be associated with the scope created for the route using the controller property. You can specify the controller either as a function or by referring to an existing controller using its name. The name reference must point to a valid controller registered with a module known to the application.

Good practice
Example 1
HomeController referenced by the route is defined in the main application module.

function HomeController() {
}

angular.module('app')
    .controller('HomeController', HomeController)
    .config(['$routeProvider', function($routeProvider) {
  $routeProvider
    .when('/', {
      templateUrl: './spa/app/home/home.html',
      controller: 'HomeController',
            controllerAs: 'vm'
    })
    .when('/:id', {
      templateUrl: './spa/app/detail/detail.html',
      controller: 'DetailController',
            controllerAs: 'vm'
    })
    .otherwise({
      redirectTo: '/'
    });
}]);

Example 2
HomeController referenced by the route is defined in a module defined as a dependency of the main module.

Bad practice
HomeController referenced by the route is defined in a module that isn't used by the main application module.