valid_emails

[eluser]Unknown[/eluser]
Using CI 1.6.2

When using valid_emails within my validation rules I get the following message included in my validation error_string:

Unable to access an error message corresponding to your field name.

To get around this I had to add an additional line to the validation_lang.php in system/languages/english to get it working:

$lang['valid_emails'] = "The %s field must contain all valid email addresses.";

The line I used to call the validation method was:

$rules['email_to'] = 'trim|required|min_length[5]|max_length[255]|valid_emails';

Thanks.