Fast lookup for EKKO‑BSART logic across
classic transactions, Fiori apps, and BAPI processing.
SAP MM BSART T160 / T161A / T161W ME21N
/ ME59N / MD04 / ME57 / ME58
Fiori F0842A / F1048 BAPI_PO_CREATE1
Table of Contents
- 1. Key Customizing Tables
- 2. ME21N
- 3. ME57 (ALV)
- 4. ME57 (Non‑ALV)
- 5. MD04
- 6. ME59
- 7. BAPI_PO_CREATE1
- 8. Fiori Applications
- 9. ME58
1. Key Customizing Tables
| Table | Purpose |
|---|---|
| T161A | Allowed PO Document Types |
| T160 | Default Document Types per Transaction Code |
| T161W | STO Settings (Doc Type, One‑Step, Underdelivery) |
| ESDUS | User Personal Defaults (e.g., BSART) |
Tip: Check authorization object M_BEST_BSA
(ACTVT = 01) if a proposed BSART does not appear in the dropdown.
2. ME21N
Default Proposal Order
- Last‑used BSART
- T160 default for ME21N (fallback ME21)
- First entry in T161
Overwrites
- User defaults via ESDUS (action PurchaseOrder, setting POHeaderProposer → BSART)
- BAdI MEPOBADI_OPEN
Header Logic
- MEPO_HEADER_FILL_BSART → checks T160 then T161 by BSTYP
- Dropdown is built from MEPO_TOPLINE‑BSART
Debug paths include: LMEGUICJI →
OPEN, LMEPOF11 → MEPO_DEFAULT_TOPLINE, LMEPOF00 →
MEPO_HEADER_READ_BSART.
3. ME57 (ALV)
STO PRs
PO doc type from T161W.Other PRs – T161A Matching Priority
- Exact match: PR doc type + PR item cat (and compatible PO doc type + PO item cat)
- If only one allowed combination exists → take it
- Match by PR item category
- Match by PR document type
- Default from T160 (ME21)
- Any compatible BSART
4. ME57 (Non‑ALV)
- T160 default for ME57
- T160 default for ME21N/ME21
- Fallback to PR document type
5. MD04
STO PRs
PO doc type from T161W.Other PRs – Selection Order via T161A
- Exact match (doc type + item category)
- Item category match
- Document type match
- Default from T160
- Any valid type
Debug: ME_PROCESS_REQUISITIONS →
LMESHOWF01 → FORM bsart_best.
6. ME59N
FM: MM_PROPOSE_DOC_TYPE- Read allowed types from T161A
- Check BAdI ME_BSART_DET
- Try to match PR document type
- If PR type allowed → select it
- If PR type not allowed → use T160 default
- If no default → first allowed BSART
See also: KBA 3108114 (Default
doc type not used when creating PO via ME59N).
7. BAPI_PO_CREATE1
Mapping
BAPIMEPOHEADER‑DOC_TYPE → MEPOHEADER‑BSART via MAP2I_BAPIHEADER_TO_HEADER.Processing
- Uses ME21N logic: LMEPOF00 → MEPO_HEADER_FILL_BSART
- MEPO_HEADER_READ_BSART reads T161
8. Fiori Applications
A) Process Purchase Requisitions (F1048)
- Determination in CL_MM_PUR_PR_PROCESS_API → IF_MM_PUR_PR_FOD_PO~CREATE_PO_DRAFT
- Calls MM_PROPOSE_DOC_TYPE (first item)
B) Manage Purchase Orders (F0842A)
- Lightweight / restricted
- Shows only PO types:
- Copied from NB
- Field selection key = NBF
Need wider creation options? Use Create
Purchase Order Advanced (WebGUI for ME21N).
9. ME58
Default Proposal Sequence
- T160 → ME58
- T160 → ME21N
- T160 → ME21
- Fallback: PR document type
Debug: FM06BF05_GENERIEREN_BESTELLUNG
→ FORM GENERIEREN_BESTELLUNG
Quick Reference – PO Doc Type Determination (BSART). Optimized
for screen & print. No BAdI available. Consider ME59N with BAdI ME_BSART_DET
for enhancements.
