TOM : THANK FOR ANSWER MY QUESTION

BUT THIS ERROR ALONE HAPPEND WITH SOME FORM

FOR EXAMPLE

I NEED ONE FORM WITH 30 OBJECT AND NOT RETURN ERROR
BUT WITH OTHERS FORMS WITH 5 OBJECTS RETURN THE ERROR, AND
THE PROGRAM EXECUTION CONTINUE NORMALY.

BUT I DONT WANT THAT SHOW THIS ERROR
CAN BE A ERROR IN MY PROGRAM?