How To Fix BK402 - Document number & is already in use.

SAP Error Message - Details

• Message type: E = Error

• Message class: BK - Create, Display, Reverse Controlling Document

• Message number: 402

• Message text: Document number & is already in use.

What causes this issue?

Document number & is locked.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BK402 - Document number & is already in use. ?

  The SAP error message BK402 ("Document number & is already in use") typically occurs in the context of financial document processing, particularly when trying to post or modify a document that is already being processed or has been posted in the system. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Document Already Posted: The document number you are trying to use has already been posted in the system, and SAP does not allow the same document number to be reused for a new transaction.
  Document in Use: The document may be locked by another user or process, preventing you from making changes or posting a new document with the same number.
  Batch Input Sessions: If you are using batch input sessions, the document might be in a session that is still being processed.
  Error in Document Flow: There might be an inconsistency in the document flow, where the system believes the document is still in use.
  
  Solutions:
  
  Check Document Status: Verify the status of the document number in question. You can do this by using transaction codes like FB03 (Display Document) to see if the document is already posted.
  Use a Different Document Number: If the document is indeed already posted, you will need to use a different document number for your new transaction.
  Unlock Document: If the document is locked, check if another user is currently using it. You may need to wait until they finish or contact them to release the lock.
  Review Batch Input Sessions: If you are using batch input, check the status of your batch input sessions using transaction SM35. Ensure that all sessions are processed or terminated if they are no longer needed.
  Consult with IT Support: If you are unable to resolve the issue, it may be necessary to consult with your SAP support team or IT department for further investigation.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FB03 (Display Document), FB02 (Change Document), and SM35 (Batch Input Monitoring).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional context or solutions.
  User Authorization: Ensure that you have the necessary authorizations to post or modify documents in the system.
  Documentation: Review SAP documentation or user manuals related to document posting and financial transactions for best practices and troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the BK402 error and take appropriate action to resolve it.