How To Fix AH492 - Reference bases do not match

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 492

• Message text: Reference bases do not match

What causes this issue?

You have used an inadmissible discount key in fact maintenance.
Reference base &v2& of the operand in the facts (quantity, price, amount
, demand) does not match reference base &v3& of the discount.

System Response

How to fix this error?

Choose an appropriate discount key using the input help in the field
<LS>Discount</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH492 - Reference bases do not match ?

  The SAP error message AH492, which states "Reference bases do not match," typically occurs in the context of financial accounting or controlling when there is a mismatch between the reference bases of different documents or entries. This can happen in various scenarios, such as during the posting of journal entries, when trying to reconcile accounts, or when executing certain financial transactions.
  Causes:
  
  
  Mismatched Reference Bases: The reference bases (such as cost centers, internal orders, or profit centers) in the documents being processed do not align. For example, if you are trying to post a transaction that references a cost center that is not valid for the specified period or does not match the reference of the original document.
  
  
  Incorrect Configuration: There may be configuration issues in the system settings related to the financial modules, such as incorrect assignment of cost elements or profit centers.
  
  
  Data Entry Errors: Manual data entry errors can lead to mismatched references, especially if the user inputs incorrect or inconsistent data.
  
  
  Document Type Issues: The document types being used may not be compatible with the reference bases being applied.
  
  
  Solutions:
  
  
  Check Reference Bases: Review the reference bases in the documents you are trying to process. Ensure that they match and are valid for the transaction you are attempting.
  
  
  Validate Configuration: Check the configuration settings in the SAP system for financial accounting and controlling. Ensure that cost centers, profit centers, and internal orders are correctly assigned and configured.
  
  
  Correct Data Entry: If the error is due to manual data entry, correct the entries to ensure that all reference bases are consistent and valid.
  
  
  Use Transaction Codes: Utilize transaction codes like FB03 (Display Document) or FBL1N (Vendor Line Item Display) to review the documents involved and identify discrepancies.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the error message and its context.
  
  
  Seek Help from SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that can help in troubleshooting, such as FB50 (G/L Account Document Entry), KSB1 (Cost Centers: Actual Line Items), and KOB1 (Order: Actual Line Items).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide specific solutions or workarounds.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the AH492 error and implement a solution to resolve it.