Send merged document as email where From and To are the same

I have a document and I want only to send (or resend) to one of the recipients e.i. one selected document I would use ‘Send merged document as email’ and choose to send a range where the ‘From’ and the ‘To’ points to the same record, but nothing gets sent.
According to the ‘Help’: 'Selects a range of records starting at the record number in the From box and ending at the record number in the To box."
Is there a ‘miscalculation’ by one in the selected range?
How do I specify that I only want that one record?