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Some comments that might not solve your problem:

1. Why do you add the same object to the list twice via push_back? Try deleting those two lines.
2. Have you confirmed that your mesh is read in correctly? You can use the print function or check for nullptr.
3. [0,0,0,0] is not a valid quaternion. This is surely corrected automatically, but if you want the neutral orientation you should set orientation.w = 1.0 anyway.