Just after I posted this (and after hours of trying to get it to work), I've found that it works only if the new entries are added to the bottom of the list, when you click "Add reservation" it adds the new entry to the top of the list, and it won't work.   The entries that I have in there were populating existing blank rows, but I can't add any more as they go to the top of the list and it gives the Error message shown on the attachment. ... View more