Hi..All
I develop application follow by Example .(Tastrade) I have problem at Order Form.when I zap data from Order table and Item table..and run my application again. I have error message this:

Data type is invalid for this property
Method : refresh
Line : 1

I don't know ..What 's happend?
I try check my application ..I can not found error..

If have error ..I click ignore ..application can run continue..when I save data and open form again ..no error in my application..

Error have when no data in Table
How I can solve?

Narong