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

RTCMMD512 - Overview

• 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