I recall having this same error with a CheckBox and doing something similiar. Try changing the default Value property to .F. in your CheckBox class.

Just a guess!

HTH,

--Paul

>Has anyone ever gotten an Error 1881 datatype mismatch when adding a checkbox to a grid when using the columns[x].addobject method. If I put the checkbox in a container, no problem; outside the container error 1881.