Thanks .
I imported a simple .fbx model that is being used as a plane to walk around on. wall pieces of geometry, that are being moved off of plane, are also simple .fbx models. They each have their own Static Mesh component.
wall pieces are being moved with Level Blueprint with a simple button press, as is AI character.
character is sent from a Target Point A to Target Point B, and is unable to reach point whether wall exists or not. wall is initially positioned in place when game starts, and NavMesh doesn’t change when wall is moved in-game.
Let me know if you have any other questions.