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Chapter 9
Creating VIs
9-6
© National Instruments Corporation
Bad Wires
A dashed wire represents a bad wire. You can get a bad wire for a number 
of reasons, such as connecting two controls, or connecting a source 
terminal to a destination terminal when the data types do not match (for 
instance, connecting a numeric to a Boolean). You can remove a bad wire 
by clicking on it with the Positioning tool and pressing <Delete>. Choosing 
Edit»Remove Bad Wires or <Ctrl-B> deletes all bad wires in the block 
diagram. This is a useful quick fix to try if your VI refuses to run or returns 
the 
Signal has Loose Ends
 error message.
Note
Do not confuse a black, dashed wire with a dotted wire. A dotted wire represents a 
Boolean data type, as the following illustration shows.
Segment
Junction
Bend
Segment
Selects a Segment
Selects a Branch
Selects an Entire Wire
1
2
3
Dashed Wire (bad)
Dotted Wire (good)