No BOM explosion for sub-contract purchased materials

Hello,
I have searched google and this forum and have not found any info on this. Hopefully someone has run across this same situation and can help.
We do not want to have a bom explosion happen for externally procured materials (using CU51). We are using user exit CCUX0800 (EXIT_SAPLCUKO_008) to set no_expl_ext_procurement = 'X'. This works good, except if the material is set up for external procurement (marc-beskz = "F") and also has a special procurement (marc-sobsl) of "30". Include LCUKOFFB says to still explode the BOM if the special procurement is "30".
Does anyone know why it does this? We don't want the bom to explode for externally procured parts even if they are set up as subcontracting ("30"). Any way we can do this with a different user exit?
Thank you.

Melissa,
Since you are using Special proc 30 ( subcontracting) system assumes BOM components will be supplied by purchaser.
When a Subcontract purchase order for subcontracted material is cut on vendor, the components of the subcontrated product is typically supplied by buyer to the vendor. Hence MRP(system ) typically explodes BOM to plan for those compoments in buyer's plant.
If however you do not want BOM to be exploded &/or components planned in buyer's plant you can set that in BOM of subcontract material at the component level. In the BOM component item detail screen (under tab status/long text) there is a field called Material provision indicator. Set that to L(material provided by vendor).
This should prevent planning of components (or explosion of BOM) for the subcontract material ( with settings F, 30).
Hope this clarifies & solves your issue. else please come back with further questions.
Thanks,
Ram

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with regards,
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http://help.sap.com/saphelp_46c/helpdata/en/b2/fa1ed4d51d11d1a69e0000e83235d4/frameset.htm
http://help.sap.com/saphelp_46c/helpdata/en/35/b0e96787a62488e10000009b38f9b7/frameset.htm
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Please post in the relevant forum.

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External activity               -e-   -e- TRA1 86 460960      96 460960
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