How To Fix MQ509 - Posting key & is not defined for G/L account items

SAP Error Message - Details

• Message type: E = Error

• Message class: MQ - Messages for Euro Changeover Package

• Message number: 509

• Message text: Posting key & is not defined for G/L account items

What causes this issue?

Line items are generated for the individual adjustments with the local
currency changeover. G/L account posting keys are needed for these
adjustment items. Posting key &V1& is not defined for G/L account
items.

System Response

The data cannot be saved.

How to fix this error?

Check your entry. Enter a posting key for G/L accounts.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MQ509 - Posting key & is not defined for G/L account items ?

  The SAP error message "MQ509 Posting key & is not defined for G/L account items" typically occurs when you are trying to post a transaction in the General Ledger (G/L) and the system cannot find a valid posting key for the specified G/L account. This can happen for several reasons, and here are the common causes, solutions, and related information:
  Causes:
  
  Invalid Posting Key: The posting key you are using is not defined in the system for the type of transaction you are trying to perform.
  Configuration Issues: The posting key may not be configured correctly in the system for the specific G/L account or transaction type.
  Account Type Mismatch: The G/L account you are trying to post to may not be compatible with the posting key being used (e.g., trying to use a posting key meant for customer accounts on a G/L account).
  Missing Authorizations: The user may not have the necessary authorizations to use the specified posting key.
  
  Solutions:
  
  
  Check Posting Key Configuration:
  
  Go to the transaction code OB13 (Define Posting Keys) to check if the posting key exists and is configured correctly for G/L account postings.
  Ensure that the posting key is set up for the correct account types (e.g., debit, credit).
  
  
  
  Verify G/L Account Settings:
  
  Check the configuration of the G/L account in transaction code FS00 (G/L Account Master Record) to ensure it is set up correctly and is active.
  Make sure the account is not blocked for postings.
  
  
  
  Use Correct Posting Key:
  
  Ensure that you are using the correct posting key for the type of transaction you are trying to post. For example, common posting keys for G/L accounts are 40 (debit) and 50 (credit).
  
  
  
  Check User Authorizations:
  
  Verify that the user has the necessary authorizations to post using the specified posting key. This can be checked in transaction code SU53 (Authorization Check) after the error occurs.
  
  
  
  Consult with SAP Basis or Functional Consultant:
  
  If you are unable to resolve the issue, it may be necessary to consult with an SAP Basis or functional consultant who can help diagnose and fix configuration issues.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  OB13: Define Posting Keys
  FS00: G/L Account Master Record
  SU53: Authorization Check
  
  
  Documentation: Refer to SAP Help documentation for detailed information on posting keys and G/L account configurations.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.