Hello,
SAP APO does not recognize the special procurement type of the components and assigns the master output's plant to the components also during creation or a change of a planned order in SAP APO.
When such a planned order is backupdated from R/3 for key completion the components get updated with the Plants from R/3 as per the Master data settings there. When the conversion indicator is set for this planned order, the conversion succeeds as the appropriate plants are present for the components.
Please refer OSS note 926779 - APO->R3: Storage location XXXX not yet created for material
Use enhancement PPAPO007 and code correction given in SAP note 926779.
Best Regards,
R.Brahmankar