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I am trying to restart the sceneView.session by using a function called restartSession(). I found that I was getting random crashes when calling this function.

My viewDidLoad():

override func viewDidLoad() {
    super.viewDidLoad()

    self.sceneView.debugOptions = [ARSCNDebugOptions.showFeaturePoints, ARSCNDebugOptions.showWorldOrigin]
    self.sceneView.session.run(configuration)
    self.sceneView.autoenablesDefaultLighting = true
}

My restartSession() function:

func restartSession() {
    self.sceneView.session.pause()
    self.sceneView.scene.rootNode.enumerateChildNodes { (node, _) in
        node.removeFromParentNode()
    }
    self.sceneView.session.run(configuration, options: [.resetTracking, .removeExistingAnchors])
}

I am running Xcode 9.4 beta and iOS 11.3.1

willhess
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