Hi, yeah the API for IK Rig and Retargeter has changed significantly in 5.6 with the addition of the retarget op stack. The chain map settings are now unique to each op within the retarget op stack. This gives more flexibility over the behaviour of the retargeter, but it means there are more data structures that you need to work with. This does make your blueprint more complicated, but you should be able to do what you want with something like this:
[Image Removed]Here, I’m first getting the IK Retarget Controller since that allows you to both get and set the settings object. Then you have to get the controller for the specific op in the stack that you’re interested in (and cast to the correct type - ie. an FK Chain Op, Run IK Rig Op, etc). Once you have the op controller, you can get the Op Settings. And then the Chain Settings now live within the Op Settings.
I’m waiting to hear back from the dev team about whether there is a more elegant API to do this, but for now, I think this should give you what you need. Let me know if not.