How To Fix RTCMMD126 - First adjust the "Valid From" date of all child nodes

SAP Error Message - Details

• Message type: E = Error

• Message class: RTCMMD - Article Hierarchy

• Message number: 126

• Message text: First adjust the "Valid From" date of all child nodes

What causes this issue?

The validity period of the assignment to change must lie within the
validity period of the parent node assignment.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Change the valid-from date to a date later than the valid-from date of
the parent node assignment.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RTCMMD126 - First adjust the "Valid From" date of all child nodes ?

  The SAP error message RTCMMD126, which states "First adjust the 'Valid From' date of all child nodes," typically occurs in the context of managing master data, particularly in the Material Management (MM) module or when dealing with hierarchical data structures in SAP.
  Cause:
  This error arises when you are trying to change the "Valid From" date of a parent node in a hierarchy (such as a material group or a product hierarchy) without first adjusting the "Valid From" dates of its child nodes. In SAP, the validity of a parent node is dependent on the validity of its child nodes. If the child nodes have a "Valid From" date that is later than the parent node's date, the system will not allow the change to be made.
  Solution:
  To resolve this error, follow these steps:
  
  
  Identify Child Nodes: Determine which child nodes are associated with the parent node you are trying to modify. You can usually find this in the same transaction or by using the hierarchy display.
  
  
  Adjust Child Nodes' Valid From Dates: 
  
  Navigate to each child node and adjust the "Valid From" date to a date that is earlier than or equal to the date you want to set for the parent node.
  Ensure that all child nodes have their "Valid From" dates updated accordingly.
  
  
  
  Change Parent Node's Valid From Date: Once all child nodes have been updated, you can then proceed to change the "Valid From" date of the parent node.
  
  
  Save Changes: After making the necessary adjustments, save your changes.
  
  
  Related Information:
  
  Transaction Codes: Depending on the context, you might be using transaction codes like MM01 (Create Material), MM02 (Change Material), or MM03 (Display Material) when encountering this error.
  Data Hierarchies: Understanding how data hierarchies work in SAP is crucial. Parent-child relationships in master data can affect various processes, including reporting and data integrity.
  Documentation: Refer to SAP Help documentation or your organization's internal documentation for specific guidelines on managing master data and hierarchies.
  Testing: After making changes, it’s a good practice to test the changes in a development or quality environment before applying them in production.
  
  If you continue to experience issues, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.