I am getting an error in the branch node. The returned value of the is overlapping actor node is empty, but the blueprint is working well regardless to the runtime error.
Is there a problem if I did not solve this error? if yes how can I solve it?
for the sedan class actually I have a generator that generates cars from the beginning of the landscape and then when these cars arrives at the end of the landscape I destroy them. Do you think the generator can be the problem as the array size is changing!
Difficult to say what is causing this without seeing the rest of the code, especially if you run this on Tick and keep changing the size of the array. Have a look at what [MENTION=29846]Blue man[/MENTION] suggested above - drag a wire off Get and do IsValid - this will allow you to skip invalid references.