Are you trying to do the Replace while in Browse mode using the "Replace Field Contets" from the menu, or are you trying to do this via a Script you have created?
I am using the "Replace Field Contents" from the menu as I haven't got as far as teaching myself about scripts yet. Thanks for the reply:-)
without getting very detailed, it should be as easy as this:
find/sort the records you want to replace a field's contents with.
in one of the records in the found set, replace the field with the desired checkbox value by clicking on that checkbox. Upon clickong on the checkbox, DO NOT click anywhere else on the layout.
direct your mouse straight up to the Records menu adn select the Replace Field Contects.