SAP Error Message Decoder
Every SAP message has a class and a three-digit number, and together they tell you which application raised it and where its documentation lives. Paste the message — the status bar text, the line from the performance assistant, or just “M8147” — and this page names the owning area, gives the first checks a consultant in that area would run, and shows how to reach the long text and the code behind it. It runs in your browser.
Paste the message
Double-click the message in the status bar to open the performance assistant; under Technical information you will find the message class and number. Copy that line, or the whole text.
Reading a message reference
A reference such as M8 147 has two parts. The class (M8) is a work area that groups the messages of one application; the number (147) identifies the text inside it. The message type — E, W, I, S, A or X — is not part of the reference: the same message can be raised as an error by one program and a warning by another, which is why the same number can stop one transaction and only warn in the next.
- E — Error — the step stops until the input is corrected.
- W — Warning — the user can press Enter and carry on; batch input and BAPIs may still treat it as an error.
- I — Information — a popup, no effect on processing.
- S — Success / status — shown in the status bar; with DISPLAY LIKE 'E' it can look like an error.
- A — Abort — the transaction terminates and unsaved work is lost.
- X — Exit — a deliberate short dump (MESSAGE_TYPE_X); read it in ST22.
Message classes this page recognises
These are the standard classes the decoder describes. For any other class it does not guess; it gives the generic route through SE91 instead.
| Class | Area | Module |
|---|---|---|
| 00 | General system messages, used by many applications | Cross-application |
| M3 | Material master | MM |
| M7 | Inventory management (goods movements) | MM |
| M8 | Logistics invoice verification and material valuation | MM / FI |
| ME | Purchasing | MM |
| 06 | Purchasing (older purchasing messages) | MM |
| MEPO | Purchase order processing (ME21N / ME22N) | MM |
| F5 | Financial accounting document posting | FI |
| F5A | Financial accounting document posting (Enjoy transactions) | FI |
| KI | Controlling account assignment (cost elements and cost objects) | CO |
| KE | Profitability analysis (CO-PA) | CO |
| AA | Asset accounting | FI-AA |
| RW | Accounting interface (documents passed from logistics to FI/CO) | FI / Logistics |
| VL | Shipping and outbound delivery | SD / LE |
| V1 | Sales document processing | SD |
| VF | Billing | SD |
| CO | Production orders | PP |
| /IWFND/ | SAP Gateway hub (OData service runtime) | Fiori / Gateway |
| /IWBEP/ | SAP Gateway backend (OData service implementation) | Fiori / Gateway |
When the long text is not enough
The long text explains what the check means; it does not always say why it failed for your document. The fastest route to the actual condition is the code. SE91’s where-used list shows every program that issues the number, and in the debugger a breakpoint on the statement MESSAGE stops just before it is raised, with the variables that decided it on screen. Do this in a test system with the same data, never by debugging a production posting.
Messages raised inside another message — RW wrapping an F5 or account determination error, Gateway errors wrapping a backend exception — need one more step: open the detail and fix the inner message, not the outer one.
Related tools
For account determination messages such as M8 147, the account determination finder decodes the OBYC entry. Browse every documented message in the SAP message library, or describe the whole incident to the SAP issue Copilot.
Area descriptions cover standard SAP message classes and may not match custom enhancements in your system. Always read the long text in your own system. ERPClimb is an independent educational platform and is not affiliated with SAP SE.