How To Fix DS437 - List &1 to be appended does not exist in tree &2, node &3

SAP Error Message - Details

• Message type: E = Error

• Message class: DS - Messages for Editing Text Elements in ABAP Programs

• Message number: 437

• Message text: List &1 to be appended does not exist in tree &2, node &3

What causes this issue?

The list specified under "Append list" either does not exist in the
selected node, or it has already been appended to another list.
You cannot append lists to more than one other list.

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

System Response

How to fix this error?

Choose a list that exists in the selected tree or node.
The list must be a basic list, that is, it may not already be appended
to another list.

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 DS437 - List &1 to be appended does not exist in tree &2, node &3 ?

  The SAP error message DS437 indicates that there is an issue with a list that is supposed to be appended to a specific tree structure, but the list does not exist in the specified tree or node. This error typically arises in the context of SAP BW (Business Warehouse) or SAP BI (Business Intelligence) when dealing with hierarchies or data structures.
  
  Cause:
  
  Non-Existent List: The list you are trying to append does not exist in the specified tree structure. This could be due to a typo in the list name or the list not being created or activated.
  Incorrect Tree or Node Reference: The tree or node you are referencing may not be correct, leading to the system being unable to find the list.
  Authorization Issues: There may be authorization issues preventing access to the list or tree.
  Data Model Changes: Changes in the data model or structure may have led to the list being