mySQL complaint on running cron; no email sent

Cron reports the following error.

user warning: Unknown table 'account_reminder' in where clause query: DELETE d_account_reminder.* FROM d_account_reminder,d_users WHERE account_reminder.uid=users.uid AND access!=0 AND users.uid!=0 AND status=1 in [PATH-INFO-HERE]/includes/database.mysql.inc on line 172.

However table d_account_reminder exists. I can see records in table.

I think this is the fix (line 124, account_reminder.module):

//Remove users who have signed up from the reminder table...
$result=db_query("DELETE {account_reminder}.* FROM {account_reminder},{users} WHERE {account_reminder}.uid={users}.uid AND access!=0 AND {users}.uid!=0 AND status=1");

But still no mail!

It looks like this might need correction

drupal_mail('acount_reminder_email',$email, $subject, $body, $from);

to

drupal_mail('account_reminder_email',$email, $subject, $body, $from);

No?

Forgive my ignorance: Is there a separate account_reminder_email module?

Please help. Functionality of this module would be great to have! Thanks.