How to get an object to follow null-parented path with round corners?

[brandonb96942845]

Short and sweet: is there a way I can get an object to follow a path whose anchor points are parented to nulls, and with round corners enabled? The only way I know of to get an object to follow a preset path is to copy the path itself and paste it into the object's position data, which won't work in this specific scenario.

Is what I'm describing even possible?

[Rick Gerard]

If you are using a shape layer rectangle, you have to right-click on the Rectangle in the timeline and convert it to a Bezier Path. 

[brandonb96942845]

Rick, the last few replies you've made to my posts have been entirely unhelpful, and this is just more of the same. I said very specifically that this was a path whose anchor points were parented to nulls, which even I knew without looking isn't possible with shape layer rectangles--so you should've realized that's not what I'm working with. If you can't be bothered to actually read the entirety of my posts, then from now on please don't bother posting a reply. Thank you.

[Rick Gerard]

I'm sorry that I didn't completely follow your post, but your insult shows a lack of maturity. It doesn't bother me. I've been solving production problems and making movies for over 50 years, and there have been more insults than I can count, but I still offer my help and support because of the people who have helped me when I was not exactly receptive to their criticism. 

When you mentioned round corners, I assumed a rectangle shape because vector paths don't have round corners; they have Bezier handles or Rotospline tension controls, but you can't visualize them. Paths also do not have Anchor Points. They have Points. 

Parenting does not do anything to a layers' Anchor Point. Anchor Points offset a layer's position. Parenting resets the Position property of the child layer relative to the parent, not the Anchor Point. When you need the true position value, you can extract a Parented layer's true position by adding a toComp() expression.

Are you talking about nulls attached to path points using the Create Nulls from Paths script and the Bezier handles on the paths?

Explain the comp structure or share a screenshot and explain your workflow, and maybe we can help you figure out how to get your object layer to follow a vector path accurately.