Mmm... strange - I get no error message...
Here is the query for the main report:
SELECT tblUnits.UnitID, tblUnits.UnitNum, (IIf([Gender]="M","M. " & [FirstName] & " " & [LastName],"Mme " & [FirstName] & " " & [LastName])) AS Salutation, tblTenants.TenantID, tblTenants.Unit_Num...