How To Fix FMFG_PAY_E018 - Derivation error; see log

SAP Error Message - Details

• Message type: E = Error

• Message class: FMFG_PAY_E -

• Message number: 018

• Message text: Derivation error; see log

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FMFG_PAY_E018 - Derivation error; see log ?

  The SAP error message FMFG_PAY_E018 indicates a "Derivation error" in the context of Funds Management (FM) in SAP. This error typically occurs when the system is unable to derive the necessary account assignment information for a financial transaction, which can be due to various reasons.
  Causes:
  
  Missing or Incorrect Configuration: The derivation rules for account assignments may not be properly configured in the system.
  Inconsistent Master Data: There may be inconsistencies or missing data in master records (e.g., cost centers, internal orders, etc.) that are required for the transaction.
  Invalid or Incomplete Document: The document being processed may be incomplete or contain invalid data that prevents proper derivation.
  Authorization Issues: The user may not have the necessary authorizations to access certain data required for the derivation.
  Custom Logic: If there are custom enhancements or user exits that affect the derivation process, they may not be functioning correctly.
  
  Solutions:
  
  Check the Log: The error message suggests checking the log for more details. You can do this by navigating to the transaction where the error occurred and reviewing the logs for specific information about what caused the derivation failure.
  Review Configuration: Go to the configuration settings for Funds Management and ensure that the derivation rules are correctly set up. This includes checking the settings for account assignment derivation.
  Validate Master Data: Ensure that all relevant master data (e.g., cost centers, internal orders, funds centers) is complete and accurate. Correct any inconsistencies found.
  Test with Different Data: If possible, try processing the transaction with different data to see if the issue persists. This can help isolate the problem.
  Check Authorizations: Ensure that the user has the necessary authorizations to perform the transaction and access the required data.
  Consult with Technical Team: If there are custom developments involved, consult with your technical team to review any custom logic that may be affecting the derivation process.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like FMAVCR01 (for checking budget availability) or FMBB (for budget adjustments) to further investigate the issue.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to Funds Management and account assignment derivation for more insights into how the system processes these transactions.
  
  If the issue persists after following these steps, it may be beneficial to engage SAP support for further assistance.