How To Fix NR138 - Number quantity greater than zero is invalid if "no buffering" chosen

SAP Error Message - Details

• Message type: E = Error

• Message class: NR - Number ranges

• Message number: 138

• Message text: Number quantity greater than zero is invalid if "no buffering" chosen

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message NR138 - Number quantity greater than zero is invalid if "no buffering" chosen ?

  The SAP error message NR138 ("Number quantity greater than zero is invalid if 'no buffering' chosen") typically occurs in the context of number range management in SAP. This error indicates that there is an issue with the configuration of number ranges, particularly when the system is set to "no buffering" for a specific number range object.
  Cause:
  
  Number Range Configuration: The error arises when a number range is configured to not use buffering, but there is an attempt to assign a number from that range that is greater than zero. This can happen if the number range is exhausted or if the system is trying to allocate a number that is not available.
  Concurrency Issues: If multiple users or processes are trying to access the same number range simultaneously, it can lead to conflicts, especially when buffering is disabled.
  Incorrect Settings: The number range object may have been incorrectly set up, leading to inconsistencies in how numbers are allocated.
  
  Solution:
  
  Check Number Range Status: Go to the transaction code SNRO (Number Range Object) and check the status of the number range. Ensure that there are available numbers in the range.
  Adjust Number Range Configuration:
  
  If the number range is set to "no buffering," consider changing it to "buffering" if appropriate for your business process. This can help alleviate issues with concurrent access.
  If buffering is necessary to be turned off, ensure that the number range has sufficient numbers available.
  
  
  Extend Number Range: If the number range is exhausted, you may need to extend it. This can be done in the same SNRO transaction by adjusting the upper limit of the number range.
  Check for Custom Code: If there are any custom developments or enhancements that interact with the number range, review them to ensure they are functioning correctly and not causing the issue.
  Review User Authorizations: Ensure that the user or process attempting to access the number range has the necessary authorizations.
  
  Related Information:
  
  Transaction Codes: 
  
  SNRO: Number Range Object Maintenance
  SNUM: Number Range Management
  
  
  Documentation: Refer to SAP Help documentation for detailed information on number range management and configuration.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to number range management and the NR138 error.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or technical team for further investigation.