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The common SAP MM errors, by area
Most SAP MM errors come down to three things: master data not maintained at the level you're working, an assignment missing in the enterprise structure, or account determination not configured for a movement. This guide groups the errors consultants hit most into the 9 MM areas below, with a plain-English explanation and the direction of the fix for each. Detailed step-by-step guides link out from here as we publish them.
Why trust these guides: they're written by practising SAP consultants and used in VoiSAP's live training, drawing on real project experience across ECC and S/4HANA — not rewritten from documentation.
How to read an MM error fast
- Master data or config? — is a material view missing, or is a config entry (OBYC, source list, release strategy) not set up?
- Follow the account-determination chain — most posting failures trace from valuation class to the OBYC transaction key to the G/L account.
- Check the period — many "can't post" errors are simply the MM period (MMPV) or FI period (OB52) not being open.
MM Area
Enterprise Structure (FI-MM-SD)
Plant not assigned to company code
MM postings fail when the plant isn't assigned to a company code. Fixed in the enterprise-structure assignment step — plant to company code.
Valuation area / valuation level — plant vs company code
Whether valuation is at plant or company-code level is a one-time, far-reaching decision; getting it wrong causes account-determination and pricing problems later.
Purchasing organization not assigned to plant / company code
Purchasing documents can't be created until the purchasing org is assigned to the plant and/or company code.
Storage location not created for the plant
Goods movements need a storage location that exists for that plant; create it before receiving stock.
Plant not assigned to sales org / distribution channel (MM-SD link)
Delivering from a plant needs the plant tied into the SD structure — the common MM-SD integration gap.
MM Area
Material Master
Material type not defined / required views not maintained
Each material type controls which views and fields exist; a missing view (e.g. accounting) blocks the process that needs it.
Material is not maintained for plant / sales org / storage location
The material exists but wasn't extended to the org level you're working in. Extend the relevant view.
Accounting / costing view missing blocks valuation postings
Without the accounting view (valuation class, price, price control), goods movements can't determine the G/L account and fail.
Material number range — internal vs external assignment
Confusion over whether SAP assigns the number or the user does; set per material type group.
MM Area
Purchasing — PR, PO, Info Records, Source Lists, RFQ
"Purchase order still contains faulty items"
One or more PO lines are incomplete (price, account assignment, delivery data). Open the item, fix the flagged field, and re-check.
"No info record found" / price not defaulting on the PO
The purchasing info record is missing or expired for that material-vendor-org, so no price defaults. Create or update the info record.
Source list — source not included though it exists (ME01/ME06)
The source list entry is missing, not flagged as a source, or outside its validity dates, so source determination ignores it.
Account assignment category (K, F, A, P) errors on the PO
The account assignment category drives which object (cost center, order, asset, project) the PO posts to; the wrong one triggers assignment errors.
"Net price must be greater than 0"
A PO or info record has no valid price. Enter the price or fix the condition record.
RFQ to quotation to price comparison flow (ME41-ME49)
The RFQ process — creating RFQs, entering quotations, and comparing prices — often trips learners on the sequence and where prices are stored.
MM Area
Release Strategy
Release strategy not triggering / not appearing on the PO or PR
The document's characteristic values don't match any release strategy. Check the characteristic values (total value, plant, etc.) against the strategy's class values.
Release strategy with vs without classification
Two different mechanisms; PO release almost always uses classification, and mixing the approaches causes strategies not to fire.
Characteristics and class setup errors (CT04 / CL02)
The class/characteristics behind the strategy must reference the correct communication structure fields, or values never match.
Changeability after release — re-triggering the strategy
Changing a value (e.g. increasing PO value) can reset the release; the changeability settings control whether it re-triggers.
MM Area
Inventory Management / Goods Movement
Movement types explained (101, 103, 201, 261, 311, 561 …)
Every goods movement uses a movement type that determines the stock and accounting effect. Knowing the common ones is half of inventory troubleshooting.
MIGO — goods receipt not possible / movement type not allowed
The GR fails due to a missing material view, closed period, or a movement type not allowed for the transaction. Check period, material, and movement type.
"Deficit of stock" / negative stock error
There isn't enough unrestricted stock for the issue/transfer, or negative stock isn't allowed for the plant/storage location.
MM posting period — "posting only possible in periods X and Y" (MMPV)
The material master period isn't open for the posting date. MMPV rolls the MM period forward — separate from the FI period close (OB52).
MM Area
Invoice Verification (MIRO / LIV)
MIRO — "balance not zero"
The invoice amount entered doesn't reconcile with the proposed amount from the PO/GR. Check quantities, values, tax, and delivery costs.
Three-way match explained (PO to GR to Invoice)
Logistics Invoice Verification checks the invoice against the PO and the goods receipt; understanding the match is key to resolving blocks.
Price / quantity variance — invoice blocked for payment
A variance beyond tolerance blocks the invoice. Review the variance, correct it, or release the block deliberately.
Releasing blocked invoices (MRBR)
Blocked invoices are released via MRBR once the variance reason is resolved or accepted.
MM Area
Pricing / Conditions
"Condition ... has no valid condition record"
A condition type in the schema has no record for the relevant key/date. Maintain the condition record or check its validity.
Calculation schema / pricing procedure not determined
Purchasing pricing fails when the schema group / calculation schema determination isn't set up for the vendor and purchasing org.
Condition type not appearing / access sequence issue
A condition doesn't show because its access sequence and condition tables don't find a matching record.
MM Area
Valuation & Account Determination (OBYC)
"Account determination for entry ... not possible" (OBYC)
The most-searched MM error. A goods movement or invoice can't find the G/L account for a transaction key. Configure the missing entry in OBYC (transaction key + valuation class + account).
OBYC transaction keys explained (BSX, WRX, GBB, PRD, …)
Each key posts a specific part of a movement: BSX = stock, WRX = GR/IR, GBB = offsetting, PRD = price differences. Knowing them makes OBYC errors solvable.
GR/IR clearing account (WRX) not maintained
Goods receipts against a PO can't post without the WRX (GR/IR) account set for the valuation class.
Price control S vs V — standard vs moving average
The material's price control changes how variances post; the wrong choice leads to unexpected PRD postings or valuation errors.
Valuation class ↔ material type ↔ G/L account chain
Account determination follows valuation class (from the material) to the G/L account in OBYC; a broken link anywhere blocks the posting.
MM Area
Special Procurement (Subcontracting / STO / Consignment)
Subcontracting — component / challan / 541 movement issues
Providing components to a subcontractor (movement 541) and reconciling them against the finished receipt is a common source of stock and posting errors.
Stock Transport Order (STO) errors
Moving stock between plants (intra- or inter-company) via an STO needs correct config for the supplying/receiving plant, and often trips on delivery and billing setup.
Consignment process errors
Consignment stock (vendor-owned until used) uses special movement types and settlement (MRKO); mishandling causes stock/liability mismatches.
Quick Answers
SAP MM errors — FAQ
The ones consultants hit most are: 'account determination for entry not possible' (OBYC), release strategy not triggering, 'no info record found', MIRO 'balance not zero', 'deficit of stock', and the MM period-close error via MMPV.
A goods movement or invoice couldn't find the G/L account for a transaction key (like BSX or WRX). It's fixed by configuring the missing entry in OBYC for that transaction key and valuation class.
The purchasing document's characteristic values don't match any release strategy. Check the values SAP reads (total net value, plant, purchasing group) against the values set in the strategy's classification.
OB52 opens and closes FI posting periods; MMPV rolls the MM material-master period forward. Both are month-end tasks but they control different things — a frequent source of confusion.
Logistics Invoice Verification checks the vendor invoice against the purchase order and the goods receipt. When quantity and price agree within tolerance, the invoice posts; a mismatch blocks it.
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