This issue is similar to FT #5613 (https://www.reallusion.com/FeedBackTracker/Issue/Scene-with-SpeedTree-causes-Iray-render-export-to-fail-at-camera-switch ), but in this case the camera moves rather than switches.

The scene has a moving camera (attached to a walking person) and a SpeedTree that is not in view.

When rendering exported frames, the render at some point fails because the texture of the SpeedTree cannot be found. The SpeedTree itself is still not in view at this point.

The following Zipped project illustrates this: http://www.virtualrealist.com/uploads/moving_camera_and_tree_problem.zip .

In the project, we export from frame 3415 through frame 3456 (rendered frames 1708 through 1728). The render fails after rendered frame 1724.