There is a preference in Windchill that determines whether items are added to the workspace 'as stored' or 'latest'. If the items were already in your workspace, then Creo/Pro will use whatever is there. If only the assembly is in the workspace, then the other dependent models will be added based on your preference setting. If you are adding things to the workspace manually, you can choose to add them either 'as stored' or 'latest'.
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