Hello Christopher,
As Cell has explained, the messages which one gets vary according to what part of the FamilySearch site one is searching and more can be specified in an IGI search.
It's just an outcome of the way the search engine has been programmed i.e. in an 'All Resources' search, it's been programmed to allow surname-only searches with or without a country specified - but not to allow you to specify anything else.
If you try to enter anything else up comes the following red message:
If you enter a last name without a first name, you must not fill in any other field except a country.In the 'IGI' however, the search engine has (much more helpfully!) been programmed to allow one to search with several other parameters specified.
One can, for instance, search with just two parameters - the surname specified plus a region selected.
Or, as well as those two parameters, one can
also specify all or any of
-an event
and/or
-a country
and/or
-a county.
But nothing else! If one tries to enter anything in the parents boxes, or the spouse boxes, or the year boxes, one gets the following red message:
If you enter a last name without a first name, you must either not enter parent or spouse names, a year, or you must enter a batch number or a film numberI hate those red messages
JAP