How To Fix AD01166 - Sales document &1 already being processed by &2

SAP Error Message - Details

• Message type: E = Error

• Message class: AD01 - DI Processor (Expense-related Billing)

• Message number: 166

• Message text: Sales document &1 already being processed by &2

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 AD01166 - Sales document &1 already being processed by &2 ?

  The SAP error message AD01166 indicates that a sales document (identified by &1) is currently being processed by another user or session (identified by &2). This typically occurs in scenarios where multiple users or processes attempt to access or modify the same sales document simultaneously, leading to a lock situation.
  Cause:
  
  Concurrent Access: Another user is currently editing or processing the same sales document.
  Long-running Transactions: A transaction that takes a long time to complete may hold a lock on the document, preventing others from accessing it.
  System Configuration: The system may be configured to lock documents during certain operations to maintain data integrity.
  
  Solution:
  
  Wait and Retry: If the document is being processed by another user, wait for them to complete their transaction and then try again.
  Identify the User: Use transaction codes like SM12 (to view lock entries) to identify the user who is currently processing the document. You can then communicate with them to understand the situation.
  Release Locks: If the lock is due to a session that is no longer active (e.g., a user has logged off unexpectedly), a system administrator can release the lock using transaction SM12.
  Check for Long-running Processes: If a process is taking too long, investigate and optimize it to reduce the time the document is locked.
  Review Custom Code: If there are custom developments or enhancements that might be causing locks, review and optimize them.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related issues.
  ST22: To check for dumps that might indicate underlying issues.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation on document locking mechanisms and best practices for handling concurrent access.
  
  By following these steps, you should be able to resolve the issue related to the AD01166 error message in SAP.