How To Fix NR099 - Competing changes are being made to the number range level

SAP Error Message - Details

• Message type: E = Error

• Message class: NR - Number ranges

• Message number: 099

• Message text: Competing changes are being made to the number range level

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message NR099 - Competing changes are being made to the number range level ?

  The SAP error message NR099, which states "Competing changes are being made to the number range level," typically occurs when multiple users or processes are trying to modify the same number range object simultaneously. This can lead to conflicts and inconsistencies in the number range management.
  Cause:
  
  Concurrent Access: Multiple users or background jobs are attempting to change the same number range object at the same time.
  Locking Mechanism: SAP uses a locking mechanism to prevent data inconsistencies. If one user has locked the number range for editing, another user trying to access it will receive this error.
  Long-running Transactions: If a transaction that modifies the number range takes too long, it can lead to this error for other users trying to access the same number range.
  
  Solution:
  
  Wait and Retry: If you encounter this error, wait for a few moments and then try again. This allows the other process to complete and release the lock.
  Check Active Sessions: Use transaction code SM12 to check for active locks. If you find a lock that seems to be causing the issue, you can discuss with the user holding the lock to see if they can release it.
  Avoid Concurrent Changes: Ensure that only one user or process is modifying the number range at a time. Establish a protocol for making changes to number ranges to avoid conflicts.
  Review Background Jobs: If there are background jobs that might be accessing the number range, review their schedules and execution times to minimize overlap.
  System Monitoring: Monitor the system for any long-running transactions that might be causing locks. You can use transaction codes like SM66 to see active processes in the system.
  
  Related Information:
  
  Number Range Objects: Understand the specific number range object you are working with. Each object can have its own settings and configurations.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SNRO (Number Range Object Maintenance) for managing number ranges.
  SAP Notes: Check SAP Notes for any known issues or patches related to number range management that might address this error.
  Documentation: Review SAP documentation for best practices in managing number ranges and avoiding conflicts.
  
  By following these steps, you should be able to resolve the NR099 error and manage number ranges more effectively in your SAP system.