Updating Mass mBOMs in the BOM Transformer
Use the 
Update Mass Downstream BOMs action in the downstream view to update the already generated variant mBOMs. It is recommended that you use the Update Mass Downstream BOMs action only when the generic eBOM, generic mBOM and variant eBOMs are up to date. That is, all these entities must not be 
out of date. Also, all the entities in the upstream view, that is generic eBOM and variant eBOMs, must be in the updated state. Refer the following topics for more details:
Update Mass Downstream BOMs action in the downstream view to update the already generated variant mBOMs. It is recommended that you use the Update Mass Downstream BOMs action only when the generic eBOM, generic mBOM and variant eBOMs are up to date. That is, all these entities must not be out of date. Also, all the entities in the upstream view, that is generic eBOM and variant eBOMs, must be in the updated state. Refer the following topics for more details:You can also selectively update the variant mBOMs. Fore more information, see the Additional Information section in Tutorial 1: Updating Mass mBOMs.