Constrain found set issue

[sandyinlet]

I'm scripting a simple routine, constrain the found set to omit all the records in which a particular field is empty — Constrain Found Set [Restore] in which the action is "Omit Records" and the criteria is Fieldname [=].

It works. Except one of the records returned has that critical field empty. I've experimented with every variation I can think of, but the same correct set is returned, plus that particular record where that field is visually empty. Not that it probably should matter, the troublesome record is the second in the set.

I suspect FMP10 is seeing some invisible character I can't see or select. Any guesses what might be going on here?

Much appreciated.

[sandyinlet]

Problem solved. Dumb inattention action on my part.

Thanks.