uri_does_not_exist

Target of URI doesn't exist: '{0}'.

The analyzer produces this diagnostic when an import, export, or part directive is found where the URI refers to a file that doesn't exist.

If the file lib.dart doesn't exist, the following code produces this diagnostic:

import 'lib.dart';

If the URI was mistyped or invalid, then correct the URI.

If the URI is correct, then create the file.