Mismatch between DataSource and Extract Structure--Need Help

Question: In SAP R/3, Business Content for 0Mat_Plant_Attr datasource does not have 2 fields on it that I would like. The extract structure it is built on (BIW_MARC_S) does have them. I have tried to get these fields on the datasource, but I am obviously doing it wrong, because it's not working. How can I add these fields to the datasource, when they are already on the extract structure, but just not selected to come over to BW?
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Thanks,
Lisa.

Answer:
Hi Lisa,

The fields are probably hidden. You can check this is RSA6 on the R/3 system. Find your datasource in the tree and click the edit button in the toolbar. All the fields are listed and there is a 'hide field' column. Also a column called 'Field only known in customer exit'. A tick in either column will prevent the field from being available in BW.

Regards,
Jon Magid. News International.

Answer:
Thanks, Jon, but this is not the case. The fields are not on the datasource at all. And if I look at the datasource in ROOSFIELD, these fields that I want are flagged as "Not Relevant for the BW Extractor". I just don't know how to edit it to make them relevant.

Any other ideas?
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Thanks,
Lisa.
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