In most situations all Master CAD documents in a CAD structure are contained in the assembly's BOM. However, there is a valid use case where this is not true.

For example, a component in a structure will be manufactured from a standard SCEM part, such as a long tube. The component is ‘Master’, but very simple and does not require its own drawing (dimensions will be placed on the assembly drawing). Rather than putting the modified CAD part in the BOM, the SCEM part is included instead to aid purchasing and manufacturing. See the schematic of this example below, where the BOM structure was defined using the ‘BOM Compare tool’ in SmarTeam.

Currently a structure of this type will be blocked during the ‘Ready for Check in PLM’ action, due to the master document not being in the BOM. A warning message will be shown stating "This component in the CAD structure of the parent document is not found in the BOM".

This check is in place to aid the smooth migration of other use cases and prevent an out-of date BOM migrating to the PLM, which will affect what is validated during the sign off procedure.

To avoid causing issues to other use cases, or creating over complex migration rules, we have taken the decision to not change this rule. Therefore, if you have a structure of this type, we would kindly ask you to use CDD to validate it.

Please note, once the documents are released, they will be migrated to the PLM via simpler checks. This will be done by the CAD-Support team before all users move over permanently to the PLM. In addition, for CAD structures created natively in the PLM, there is a system in place to create a BOM of this nature. Please see here for more information on this topic.

Please be aware, if CAD B is ‘Non Master’ RFC in PLM can still be used. In this case you will be shown a warning message reminding you to attach the ‘Non Master’ document as a root object of your workflow in the PLM, else it will not be released.