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# `Missing Hash Prefix`
error in component `$location`

    Invalid url "{0}", missing hash prefix "{1}".

## Description

This error occurs when `$location` service is configured to use a hash prefix but this prefix was not present in a url that the `$location` service was asked to parse.

For example if you configure `$location` service with prefix `'!'`:

    myApp.config(function($locationProvider) {
      $locationProvider.prefix('!');
    });

If you enter the app at url `http:/myapp.com/#/myView` this error will be throw.

The correct url for this configuration is `http:/myapp.com/#!/myView` (note the `'!'` after `'#'` symbol).