Diesel Tool System.ArgumentOutOfRangeException...

For some reason, when I try to export the com_prop_jewelry_tiara.model or the com_prop_jewelry_display_jewel_2_b.model, i get this stupid error...
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Does anybody know how to fix it or avoid it?
Think EvilBob might be the best guy to answer it.
In the case of weapon part model which I usually do, I can just simply use adds syntax to 'call' the model and it'll 'exist' alongside of the caller model.