How To Fix RTCMMD512 - External number assignment for hierarchy levels is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: RTCMMD - Article Hierarchy

• Message number: 512

• Message text: External number assignment for hierarchy levels is not possible

What causes this issue?

During migration of article hierarchies, no external number assignment
for hierarchy levels is possible. You can only assign internal numbers
to hierarchy levels.

System Response

The system cancels migration.

How to fix this error?

In Customizing for <LS>Logistics - General</> under <LS>Article
Hierarchy -> Edit Hierarchy Levels</><(>,<)> check that <LS>External No.
Assignment</> is not selected.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RTCMMD512 - External number assignment for hierarchy levels is not possible ?

  The SAP error message RTCMMD512, which states "External number assignment for hierarchy levels is not possible," typically occurs in the context of managing hierarchical data structures, such as cost centers, profit centers, or other organizational units in SAP. This error indicates that there is an issue with the external number assignment for the hierarchy levels you are trying to create or modify.
  Causes:
  
  
  Incorrect Number Range Configuration: The number range for the hierarchy levels may not be properly configured. If the number range is set to internal, but you are trying to assign an external number, this error will occur.
  
  
  Hierarchy Level Settings: The settings for the hierarchy levels may not allow for external number assignment. This can happen if the hierarchy is set up to use internal numbering only.
  
  
  Authorization Issues: Lack of proper authorizations to create or modify hierarchy levels can also lead to this error.
  
  
  Data Consistency Issues: There may be inconsistencies in the data that prevent the system from processing the external number assignment correctly.
  
  
  Solutions:
  
  
  Check Number Range Configuration:
  
  Go to the transaction code SNRO (Number Range Objects) and check the configuration for the relevant number range object. Ensure that the number range is set up to allow external number assignment if that is your intention.
  
  
  
  Review Hierarchy Level Settings:
  
  Check the settings for the hierarchy levels in the relevant configuration area (e.g., controlling, financial accounting). Ensure that the hierarchy levels are configured to allow external number assignment if needed.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to create or modify hierarchy levels. You may need to consult with your SAP security team to verify this.
  
  
  
  Data Consistency Check:
  
  Perform a consistency check on the data related to the hierarchy levels. Look for any inconsistencies or errors that may be causing the issue.
  
  
  
  Use Internal Number Assignment:
  
  If external number assignment is not a requirement, consider using internal number assignment instead. This can often resolve the issue without further configuration changes.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message. There may be patches or updates that can resolve the issue.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OKB9 (for number range management) and KSH1 (for creating cost centers) or KSH2 (for changing cost centers).
  Documentation: Review SAP documentation related to the specific module you are working with (e.g., Controlling, Financial Accounting) for more detailed guidance on hierarchy management.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered and resolved similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.