Blueprint runtime errors "accessed None"

Hi I’m very noob to UE4 and I’ve been trying to get a IK foot placement system to work in my TP game a long side with a radial menu but the menu keeps coming up with the same errors any help would be very welcome community. plz and thank you.

alt text

Hello there

The error just says that Main UI hasn’t been set with anything.

In short, Main UI is a pointer (also called reference), and it just points to the actual thing. But you must provide the actual thing at some point for it to hold any relevant data you can access.

It could also just be that when you’re trying to access the variable it just hasn’t been set yet. You use the “Is Valid” branch macro to check for that.

When scripting, managing in what order things happen is a big deal.