How To Fix T1159 - Internal number assignment necessary for underlying transaction number

SAP Error Message - Details

• Message type: E = Error

• Message class: T1 - Financial instruments

• Message number: 159

• Message text: Internal number assignment necessary for underlying transaction number

What causes this issue?

During customizing, the underlying was allocated a number range
which specifies external number assignment.

How to fix this error?

Contact your customizing administrator.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message T1159 - Internal number assignment necessary for underlying transaction number ?

  The SAP error message T1159, which states "Internal number assignment necessary for underlying transaction number," typically occurs when there is an issue with the number assignment for a transaction in the SAP system. This error can arise in various contexts, such as when creating documents, posting transactions, or during other processes that require unique identifiers.
  Cause:
  
  Missing Number Ranges: The most common cause of this error is that the number range for the specific transaction type has not been defined or is not properly configured.
  Number Range Intervals: The number range intervals may be exhausted, meaning that all available numbers have been used up.
  Configuration Issues: There may be issues in the configuration settings related to number assignment for the specific transaction.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access or create the required number range.
  
  Solution:
  
  
  Check Number Range Configuration:
  
  Go to the transaction code SNRO (Number Range Objects).
  Find the relevant number range object for the transaction that is causing the error.
  Ensure that the number range intervals are defined and that they are not exhausted.
  
  
  
  Extend Number Range:
  
  If the number range is exhausted, you can extend the number range intervals to allow for more numbers to be assigned.
  This can be done in the same SNRO transaction by editing the intervals.
  
  
  
  Review Configuration:
  
  Check the configuration settings for the specific transaction in the relevant customizing transaction (e.g., SPRO).
  Ensure that the number assignment is set up correctly for the transaction type.
  
  
  
  Check Authorizations:
  
  Verify that the user has the necessary authorizations to create or access the number range.
  This can be checked in the user roles and authorizations.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the specific transaction to see if there are any known issues or additional configuration steps required.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: SNRO (Number Range Objects), SPRO (SAP Reference IMG), SE11 (Data Dictionary).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  User Roles: Ensure that the user has the appropriate roles assigned to perform the transaction.
  
  By following these steps, you should be able to identify and resolve the cause of the T1159 error in your SAP system.