I am getting this error from this code: =[Forms]![Master Form]![Parents.fullName]
The problem is that the last parameter has a "." in the name. But this is because the record source is a query with two tables and both tables have a field called "Full Name." So in order to distinguish between the two, I presume Access adds the table name followed by a period as a qualifier to differentiate between the two fields with the same name.
I suppose getting around this would involve changing Full Name in one table to something different. But suppose I wanted to keep things as is, with a field called Full Name appearing in both tables. If I wanted to do that, is there a way around this?