SAP Function Module search on WSTN1
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WSTN1_INFO_RECORD_BUILD - Fill data of the purchasing info records
WSTN1_LISTING_COPY - Copy listing specific article fields
WSTN1_MATERIAL_DATA_READ - Read selected data for given material
WSTN1_POST_LISTING_SINGLE - Create listing conditions for given prepack material
WSTN1_POST_PREPACK_ALL - Maintain master data for all prepacks
WSTN1_POST_PREPACK_SINGLE - Maintain prepack material and corresponding data
WSTN1_REFERENCE_COPY - Copy data from reference material
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