How to connect geometry data with object definitions/instances

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SUEntitiesFill throw the exception: Access violation reading location 0x0000000000000000

I have tried to add entities into the component definition, then create the instance of the component definition, add those into a model. However, the SketchupApi throw the exception: Access violation reading location 0x0000000000000000 with the function SUEntitiesFill. And the following is code segment. SUEntitiesRef entities = SU_INVALID; SUComponentDefinitionRef comp_def = SU_INVALID; SUEntitiesRef comp_def_entities = SU_INVALID; SUComponentInstanceRef instance = SU_INVALID; SUModelGetEntiti…