How To Fix HDS042 - Field "&2"& needed for field "&1&" does not exist in the derivation tree

HDS042 - Overview

• Message type: E = Error

• Message class: HDS - HDS Message Class

• Message number: 042

• Message text: Field "&2"& needed for field "&1&" does not exist in the derivation tree

What causes this issue?

You used a field in the definition of the condition of a derivation node
that requires a unique specification of another field in a superordinate
node.

System Response

The derivation tree is not consistent.

How to fix this error?

Proceed as follows:
Insert a new node anywhere in the tree that contains a unique condition
(with SAME)LEICH) for the required field. If necessary you can reuse an
existing node.
Assign the node belonging to the error message either directly below
this node or in a subtree that is assigned somewhere below this node.
To reassign a node you can either use the drag and drop or the copy and
paste function.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

HDS042 - Details

• The SAP error message HDS042 indicates that a required field for a specific derivation in the data processing or transformation does not exist in the derivation tree. This typically occurs in the context of data extraction, transformation, and loading (ETL) processes, particularly when working with SAP Data Services or similar tools.
  
  Cause:
  
  Missing Field in Source: The field that is required for the derivation does not exist in the source data or the data structure being processed.
  Incorrect Mapping: There may be an issue with how fields are mapped in the data flow, leading to a situation where the system expects a field that is not available.
  Changes in Data Structure: If the underlying data structure has changed (e.g., fields were added or removed), the derivation tree may not be updated accordingly.
  
  Configuration Issues: There may be configuration issues in the data flow or transformation logic that prevent the system from recognizing the required field.
  
  
  Solution:
  
  Check