InfoPath Dev

Does the function "Is not blank" work for rich text boxes? Tried to use that to change a value from another field - but unfortunately it doesnt work.

• Field A: Rich Text Box
• Binary Field B: False/True with False as default value

Tried to apply the following rule to Field B: If Field "is not blank" then change Field B from False to True. I don't get a error message but unfortunately Field B does not change whatever I do with Field A.

 Is Not Blank works fine with Rich Text Boxes, but you need to put the rule on Field A, not Field B.