Here is the problem. I create a type definition control on my front panel. I then pass a reference to this control into a sub VI. To do this I have to place a reference control on the sub VI to accept the input type definition reference. Now if I go back and modify the type definition control, the reference control on the sub VI to accept the type definition reference is no longer valid and the result is a broken wire. To fix this I have to create a new reference control on the sub VI to accept the type definition reference, again. It would be very nice if I could somehow link the reference control on the sub VI to the type definition so that when I modify the type definition the reference control linked to it would automatically update as well.
