Custom class test if null fails

Question

This error comes up only occasionally. But I make 2 separate checks to see if current_ecoNode is null before working on it and somehow it's still gets through when it's null. Am I missing something?

current_ecoNode variable type is a custom class that extends GraphNode

Answer 1

It could be that current_ecoNode is being freed. Try using is_instance_valid instead of != null.