How To Fix TB820 - Number range number assignment locked by & (try again later)

SAP Error Message - Details

• Message type: E = Error

• Message class: TB - SM31 table maintenance messages

• Message number: 820

• Message text: Number range number assignment locked by & (try again later)

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 TB820 - Number range number assignment locked by & (try again later) ?

  The SAP error message TB820 indicates that a number range is currently locked by another user or process, preventing you from using it for number assignment. This can occur in various SAP modules where number ranges are utilized, such as in document creation, invoice processing, or other transactional activities.
  Cause:
  
  Concurrent Access: Another user or process is currently using the number range, which locks it for exclusive access.
  Long-running Transactions: A transaction that is taking a long time to complete may hold the lock on the number range.
  System Configuration: The number range may be configured in a way that restricts access or has been set to be locked for certain operations.
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for a few moments and then try again. The lock may be released once the other user or process completes their transaction.
  Identify the Lock: Use transaction code SM12 to check for locks in the system. You can filter by the number range object or user to see who is holding the lock.
  Release the Lock: If you have the necessary authorizations, you can manually release the lock from SM12. However, be cautious with this approach, as it may disrupt the other user's work.
  Check for Long-running Jobs: Use transaction code SM37 to check for any long-running jobs that might be holding the lock. If you find any, you may need to wait for them to complete or consult with the responsible team.
  Review Number Range Configuration: If this issue occurs frequently, review the configuration of the number range in transaction SNRO to ensure it is set up correctly and that there are no unnecessary restrictions.
  
  Related Information:
  
  Number Range Objects: Each number range is associated with a specific object in SAP. Understanding the object can help in troubleshooting.
  User Authorizations: Ensure that you have the necessary authorizations to access and modify number ranges.
  System Performance: If locks are a frequent issue, it may indicate performance problems in the system that need to be addressed.
  SAP Notes: Check for any relevant SAP Notes that may address known issues with number range locks or provide additional troubleshooting steps.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.