Keep geeting this "Can't set value to Null when checkbox property = False"

[ponl0002]

When I open one of my form keep geeting this message "Can't set value to
Null when checkbox property = False". There is one checkbox on that
form(control source is Yes/No type) but even I remove that checkbox, I still
get the same message. Anybody got a clue? Please help.

Thanks for reading

Pete

 

[DES]

Date/Time Picker

This error message relates specifically to the check box property on the date time picker control