Hi again!
Sorry for the (very) late response.
You are right, but the error message you refer to is shown first when you try to execute the broken vi. If you hold the wire tool over the broken wire, you will get the message in the original post (that isn't very helpfull).
I wasn't stuborn enough, and didn't try to execute the broken vi. So i didnt see the better error message. :-)
best regards