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LETRA_DPP_GET_BLOCK_FLAG - DP&P: Check on blocked vendor
LETRA_IRF_READ_EXT_VFKP_LIFNR - Data Enhancement for data collection SD_VTTK
LETRA_IRF_READ_EXT_VTTK_KUNNR - Data Enhancement for data collection SD_VTTK
LETRA_IRF_READ_EXT_VTTS_KUNNR - Data Enhancement for data collection SD_VTTK
LETRA_IRF_READ_EXT_VTTS_LIFNR - Data Enhancement for data collection SD_VTTK
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