DBM - PA Characteristic Derivation when Settling Orders to PA

Hi,

I am having a problem in deriving the material characteristic for PA when settling the Internal Orders used by DBM for the various scenarios. I have setup a comprehensive Source Structure at Material Group Level and the Value Fields are coming through fine, but cannot find a way to derive either the Material or Material Group PA characteristic.

I cannot find a link in any tables that I can use. I have the Internal Order Number and the DBM Order Number but not the item number to use.

Has anybody come across this situation. If so could they please share their knowlege.

Thanks

Don