This is not quite right.

This error occurs when you try to "re-open" a module that has not yet been defined.

Remember that you define a new module by providing two parameters: the first is the name of the module and the second is the list of dependent modules.  If you do not provide this second parameter then the injector assumes that you are trying to access/reopen a previously defined module.

```
angular.module('myApp'); // note the missing []
```