Dear Alejandro,
If your situation is the "normal" one, you can issue the command SET NULLDISPLAY TO " " in your MAIN, and that should do it.
Saludos,
Les Pínter
Les Pinter
(650) 344-3969
Les@LesPinter.com for consulting bookings.
www.LesPinter.com.
Watch for my forthcoming book on "Developing Database Applications in VFP and VB.NET".