Hi Andy,
Did you ever solve this issue. I think I have exactly the same problem.
Subcontracted item planned in APO SNP. BOM Contains a mixture of Products planned in APO and Packaging materials planned in ECC. The Purchase Req for the final product generated in APO is passed to ECC. But when we look at the components only the non APO Planned Components are displayed. If we force a BOM Explosion in the req or when converting to Purchase order the APO components get added but why do they not appear already?
Would be very interested to find out if you were able to solve this issue.
Thanks