Ok, but I do not completely understand the function…In the input of the function: Target actor is my IA, but HitArray is? For me hit array is Vector … With MultiTrace output I can not connect, so I have to create an output variable that will be HitArray?
For the rest I understand the variables and comparisons that set the index to the end that is recovered when the Loop is completed.
As against output The variable NearestActor, what is it ?
Sorry for my snail brain 
And please, for the next post answer not comment…
Thanks