Linetrace return value

Iam working on an ai with the help of the behaviour tree tutorials. Now I got my ai tuned so when ever there is an item in its range he can see it and will walk towards it. But as soon as I pick up the item the trace stops. Which is fine, but as soon as the trace stops I want the ai to go back to his routine.

My issue with LineTraceByChannel is that iam not getting any return value. Iam getting a value when the trace finds the item, but not when the trace doesnt find anything.

Is it possible to trigger something when there is nothing to trace or do I need to find a work out for it?

Iam the same blueprint as used in the tutorial just slighty modified with values.