# Sap Wm

> >

- **Type:** Skill
- **Install:** `agentstack add skill-boxlogodev-sapstack-sap-wm`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [BoxLogoDev](https://agentstack.voostack.com/s/boxlogodev)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [BoxLogoDev](https://github.com/BoxLogoDev)
- **Source:** https://github.com/BoxLogoDev/sapstack/tree/main/plugins/sap-wm/skills/sap-wm

## Install

```sh
agentstack add skill-boxlogodev-sapstack-sap-wm
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

## 1. Environment Intake (Critical)

**ECC vs S/4HANA Alert**: WM is **DEPRECATED in S/4HANA (all releases)**. 
- **S/4HANA on-premise / RISE**: Use embedded EWM (`sap-ewm` skill) or Stock Room Management
- **ECC 6.0**: WM fully supported through extended maintenance (2025)
- **Dual-run transition**: ECC WM → S/4HANA EWM requires process redesign (not 1:1 mapping)

**Questions to ask user**:
1. ECC 6.0 (which EhP?) or S/4HANA already?
2. Warehouse network: single, multi, or 3PL outsourced?
3. RF terminal / barcode capability active?
4. Current issue: process bottleneck, data accuracy, integration, or migration planning?

---

## 2. Warehouse Structure (LS01N / LS03N / LQUA)

### Hierarchy & Tables

| Level | T-code | Definition | Table |
|-------|--------|------------|-------|
| **Warehouse** | LS01N | Top container, assigned to plants | LAGP |
| **Storage Type** | LS01 | Physical zone (rack, yard, high-bay, flow) | LTYP |
| **Storage Section** | LS03N | Sub-zone (aisle, row) | LEIN |
| **Storage Bin** | LS03N | Individual slot (address: WH-ST-SEC-BIN) | LQUA |

### Warehouse Master (LAGP) Key Fields
- **LGNUM**: Warehouse number (2 chars, e.g., "01")
- **LGSYS**: Flag — `W` (WM system) or `D` (Decentralized)
- **WERKS**: Plant assignment
- **LGPLA** format: 3-digit ST + 3-digit section + 3-digit bin (e.g., "001001001")

### Issue: "Cannot create storage bins"

**Root Cause**: Missing storage section linking
**Check**: SE16N → LEIN (verify section exists); SE16N → LQUA (verify bins)
**Fix**: LS03N → Create Section → Create Bins (batch entry) → Trigger MRP

---

## 3. Transfer Order (LT01 / LT03 / LT0E / LT06)

### Key T-codes

| T-code | Function | Field |
|--------|----------|-------|
| **LT01** | Create TO manually | LGPLA (from), LGPLB (to) |
| **LT03** | Release picking TO | Qty by storage section |
| **LT0E** | Release putaway TO | Destination bin |
| **LT0A** | Confirm TO execution | Updates LQUA stock |
| **LT0G** | RF execution (handheld) | Worker mobile entry |
| **LT04** | Cancel TO | Full reversal |

### Process Flow
```
GR (MIGO 101) → TR created → LB10 batch → TO created (LT01)
  ↓
Release (LT03/LT0E) → RF Execute (LT0G) → Confirm (LT0A)
  ↓
Stock in LQUA, available for picking
```

### Tables (LTAK / LTAP)

**LTAK** (header):
- LGNUM, TANUM (TO number)
- TPTYP (10=picking, 20=putaway, 30=inventory)
- KZVLP (two-phase picking flag)

**LTAP** (lines):
- LGPLA (source bin), LGPLB (dest bin)
- MATKX (material), MENGE (qty), ERFME (UOM)
- LGMNG (actually moved qty)

### Issue: "Transfer Order stuck in Pick phase"

**Root Cause**: Partial RF execution + system failure
**Check**: SE16N → LTAP: LGMNG vs MENGE; LT01 → Messages tab
**Fix**: LT0A (resume confirm) OR LT04 (cancel & recreate)

---

## 4. Transfer Requirement (LB01 / LB10)

### Auto-Creation Triggers

| Source | T-code | Type |
|--------|--------|------|
| GR | MIGO 101 | Putaway TR |
| Delivery | VL01N | Picking TR |
| Production | PP | Component withdrawal TR |
| Inventory diff | LI07 | Correction TR |

### Key Transactions

| T-code | Function | Audience |
|--------|----------|----------|
| **LB01** | Create TR manually | Planner |
| **LB03** | Release TR for TO | Coordinator |
| **LB10** | Auto-convert TR → TO | Batch job |
| **LB05** | TR search/list | Daily monitoring |

### LB10 Batch Job (Auto TO Creation)

**Purpose**: Convert released TRs → TOs using putaway strategy
**Execution**: Nightly (e.g., 23:00) — if fails, goods stuck in receiving
**Monitor**: SM37 (job log) or LS12 (TO creation report)

**Table LTBK** (TR header):
- LGNUM, TRID (TR number)
- TDRTY (01=putaway, 02=picking, 03=replenish)

---

## 5. Putaway & Picking Strategies

### Putaway Strategy (LS0N)

Determines **destination bin** for incoming stock.

| Strategy | Name | Best For | Logic |
|----------|------|----------|-------|
| **00** | Fixed Bin | High-value A-items | Always same bin |
| **01** | High-Rack (ASRS) | High-bay volume | Empty level/aisle |
| **02** | Addition Strategy | Normal WM | Same bin + space, else next-empty |
| **03** | Next Empty | Flexible rack | Always first available |
| **10** | Manual | Special cases | Planner override |

### Issue: "Putaway directs to wrong bin"

**Root Cause**: Strategy misconfiguration or bin full
**Check**: LS0N → strategy assignment; SE16N → LQUA: LGMNG vs LTCAP
**Fix**: Increase capacity (LS03N) OR change strategy (LS0N) OR manual override (LT01)

### Picking Strategy (LS20)

| Strategy | Name | Use Case |
|----------|------|----------|
| **00** | Fixed Bin | Slow-movers |
| **01** | FIFO | Perishables, batch-tracked |
| **02** | LIFO | Frozen goods |
| **03** | Bulk / Open | Palletized high-volume |
| **10** | Manual | Flexible picking |

### Issue: "Picking TO shows 'No stock available' despite inventory"

**Root Cause**: Stock in wrong section or strategy mismatch
**Check**: SE16N → LQUA: locked status? Strategy allows section? SE16N → LTAP: which bins picked?
**Fix**: Move stock via TO (LT01) OR override strategy (LT01 manual) OR unlock section (LS16)

---

## 6. WM-MM Integration (Goods Receipt → Warehouse)

### Complete Flow

```
PO (ME21N) → GR (MIGO 101, MVT 101) → Material doc (MKPF/MSEG)
  ↓
If WM active: TR created (LTBK, putaway)
  ↓
Putaway strategy applied (LS0N)
  ↓
LB10 batch: TR → TO (LTAK/LTAP)
  ↓
RF execution (LT0G) → TO confirmed (LT0A)
  ↓
Stock in LQUA, available for sales/picking
```

### Config: Activate WM (LS19 - Goods Movement Parameters)

- **KZLTAP**: Auto-create TR on GR? `X` = yes
- **KZLTAU**: Auto-create TO from TR? `X` = yes (if LB10 running)
- **KZLTPE**: Two-phase picking? `X` = pick → staging → ship

### Issue: "GR posted but TR never created"

**Root Cause**: WM not activated or storage location not assigned
**Check**: LS17 (storage location assignment), OB8B (plant-WM), MIGO (warehouse field)
**Fix**: LS17 → create assignment OR repeat GR

---

## 7. WM-SD Integration (Delivery → Picking)

### Complete Flow

```
Sales Order (VA01) → Delivery (VL01N)
  ↓
Auto-create picking TR (if LPICK = X in VL0N)
  ↓
LB10: TR → picking TO (strategy 01=FIFO typical)
  ↓
RF picking (LT0G) → staging bin
  ↓
PGI (VF01) → invoice created
```

### Config: Enable Picking in Warehouse

**VL0N** (delivery type):
- **LPICK**: Picking required? `X` = yes

**OB8C** (storage location):
- **LSORT**: Use for WM? `X` = yes

### Issue: "Delivery created, picking TR not auto-created"

**Root Cause**: LPICK disabled or storage location not WM-enabled
**Check**: VL0N (LPICK flag), OB8C (LSORT flag), SE16N → LTBK (any TR created?)
**Fix**: VL0N → set LPICK = `X` → recreate delivery

---

## 8. Physical Inventory in WM (LI01N / LI02N)

### Types

| Type | T-code | Scope | Frequency |
|------|--------|-------|-----------|
| **Full** | LI01N | All warehouse stock | Annual |
| **Sample** | LI02N | Selected sections | Quarterly |
| **Cycle** | LI03N | Material/section | Monthly/continuous |

### Flow

```
LI01N (create doc) → LI04 (print sheet) → Count physical stock
  ↓
LI04 (enter results) → LI07 (post differences)
  ↓
MM doc created (401/402 MVT) → LQUA adjusted
```

### WM PI vs MM PI

| Aspect | WM (LI01N) | MM (LI01) |
|--------|-----------|---------|
| **Scope** | Warehouse bins (LQUA detail) | Storage locations (MARD) |
| **Granularity** | By bin | By location |
| **Batch/Serial** | Full detail | Batch-level |

### Issue: "Count sheet shows zero system qty but WM has stock"

**Root Cause**: LQUA (WM) ≠ MARD (MM) — movements bypassed WM
**Check**: SE16N → LQUA (sum qtys), SE16N → MARD (compare), SE16N → MSEG (recent GI)
**Fix**: LI07 (post adjustment) OR manual TO correction (LT01)

---

## 9. Decentralized WM (MWMII)

Simple warehouse management without bins/sections. Each plant manages own goods movement.

**When to use**: Multi-plant independent operations (NO bins/sections/strategies)
**When NOT to use**: Need rack control, FIFO/LIFO, RF execution → use central WM instead

**Config**: SM30 → TWMII (plant-level settings)

---

## 10. ECC WM → S/4HANA Migration

### Why WM Deprecated

**S/4HANA has NO WM module**. Replaced by:
- **Embedded EWM** (enhanced warehouse management with resource management)
- **Stock Room Management** (simplified, basic movements)

### Migration Options

| Option | Effort | Best For |
|--------|--------|----------|
| ECC WM → EWM | HIGH | Large, complex warehouses |
| ECC WM → Stock Mgmt | MEDIUM | Small, simple operations |
| Keep ECC dual-run | MEDIUM | Transition period |

### Key Differences (WM → EWM)

| ECC WM | S/4HANA EWM |
|--------|----------|
| Storage Type (LTYP) | Warehouse Process Type |
| Transfer Order (LTAK) | Warehouse Order |
| Putaway Strategy (LS0N) | Putaway Rule (different config) |
| RF (LT0G) | RF Screen (/SCWM/RFUI — new tech) |
| ❌ Adds in EWM: Resource Mgmt, Yard Mgmt, Wave picking |

**Recommendation**: Use EWM for S/4HANA (see `sap-ewm` skill). WM 1:1 not possible.

---

## 11. Korean Logistics (한국 현장)

### Typical Setup: Manufacturing / 3PL

**Warehouse tiers**:
- **생산창고** (production WH) ← factory GR
- **물류센터** (logistics center) ← distribution hub
- **반납창고** (return WH) ← defects

**필수 기능**:
- **바코드/RF 터미널**: CJ, Coupang, Samsung parts (standard)
- **팔레트 관리**: 식료품, 전자부품 (high-volume)
- **냉장/냉동**: Separate ST with capacity limits
- **선입선출 (FIFO) 강제**: 식품/의약품 — picking strategy 01 MUST be used

### Example: Korean Food Distribution WH

```
Warehouse "PJ" (plant JP01, company 1000):
  ST 01 (rack, ambient) → Sec A1-A5 (fast-movers), Sec A6-A10 (slow)
  ST 02 (cold, 2-8°C) → Sec C1-C3 (yogurt, milk, frozen)
  ST 03 (returns) → Sec R1 (defects, quarantine)

Putaway: 02 (addition + next-empty)
Picking: 01 (FIFO — regulatory requirement)
RF Terminal: Symbol/Zebra with ZMM
Inventory: Monthly cycle count (LI03)
```

---

## 12. Key References

**Primary Tables**:
- LAGP: Warehouse master
- LTYP: Storage type
- LEIN: Storage section
- LQUA: Storage bin / quant
- LTBK: Transfer requirement
- LTAK: Transfer order (header)
- LTAP: Transfer order (lines)

**Configuration T-codes**:
- LS01N: Warehouse structure
- LS0N: Putaway strategies
- LS20: Picking strategies
- LS13: Cycle count params
- LS19: WM goods movement params
- LS17: Storage location assignment

**Standard Response Format**: Issue → Root Cause → Check (T-code + table) → Fix → Prevention → SAP Note

---

**Last Updated**: 2025 | **ECC Status**: Extended Support | **S/4HANA**: Use EWM skill

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [BoxLogoDev](https://github.com/BoxLogoDev)
- **Source:** [BoxLogoDev/sapstack](https://github.com/BoxLogoDev/sapstack)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-boxlogodev-sapstack-sap-wm
- Seller: https://agentstack.voostack.com/s/boxlogodev
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.