How to update the scene with C api?

I use SUModelGetSceneWithName to get the scene.
Modify the scene.
Updating the scene via SUSceneSetFlags .
Save with SUModelSaveToFileWithVersion.

But…scene update failed.

I think another coder also had problems. See …

If you cannot get it working with the latest version of the C API, please log a bug report in the official tracker. This was suggested at the bottom of the linked topic, but no report was ever filed:

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Thanks you for your reply.