How To Fix M8_2126 - Differential invoicing: Item &1 is inconsistent

SAP Error Message - Details

• Message type: E = Error

• Message class: M8_2 - Logistics Invoice Verification

• Message number: 126

• Message text: Differential invoicing: Item &1 is inconsistent

What causes this issue?

If a preceding document has been posted, a differential invoice must
contain exactly one credit memo item corresponding to and assigned to
each invoice item.
A credit memo item must contain a valid reference item number that
refers to the assigned invoice item number. There must not be more than
one credit memo item referring to the same invoice item, and there must
not be more than one invoice item used for the same goods receipt.
If no preceding document has been posted, there must not be any credit
memo items. In that case the invoice item must be a positive amount.

System Response

The invoice cannot be posted.

How to fix this error?

When performing differential invoicing, ensure that the IDoc or SOA
message includes the correct invoice items and credit memo items.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M8_2126 - Differential invoicing: Item &1 is inconsistent ?

  The SAP error message M8_2126, which states "Differential invoicing: Item &1 is inconsistent," typically occurs in the context of differential invoicing in the Materials Management (MM) module. This error indicates that there is an inconsistency with the item specified in the invoice, which can arise from various reasons.
  Causes:
  
  Inconsistent Data: The item may have inconsistent data in the invoice compared to the original purchase order or delivery.
  Missing or Incorrect Reference: The reference document (like a purchase order or delivery) may be missing or incorrectly referenced.
  Price Changes: There may have been changes in pricing or conditions that are not reflected in the invoice.
  Quantity Discrepancies: The quantity billed may not match the quantity received or ordered.
  Document Status: The status of the related documents (like the purchase order) may not allow for differential invoicing.
  Configuration Issues: There may be configuration issues in the differential invoicing settings in the system.
  
  Solutions:
  
  Check the Invoice and Reference Documents: Verify that the invoice item matches the corresponding purchase order or delivery in terms of quantity, price, and other relevant details.
  Review Pricing Conditions: Ensure that the pricing conditions are correctly set up and that any changes are reflected in the invoice.
  Correct Inconsistencies: If there are discrepancies, correct them in the invoice or the related documents as necessary.
  Check Document Status: Ensure that the related documents are in a status that allows for differential invoicing.
  Consult Configuration: If the issue persists, consult with your SAP configuration team to review the settings related to differential invoicing.
  Use Transaction Codes: Utilize transaction codes like ME23N (Display Purchase Order) or MIGO (Goods Movement) to check the details of the related documents.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to SAP documentation on differential invoicing for detailed guidelines and best practices.
  Support: If the issue cannot be resolved internally, consider reaching out to SAP support for assistance.
  
  By following these steps, you should be able to identify and resolve the inconsistency causing the M8_2126 error message.