How To Fix SWDP_WB_TOOL816 - &1 must not be a child element of &2

SWDP_WB_TOOL816 - Overview

• Message type: E = Error

• Message class: SWDP_WB_TOOL - Web Dynpro: Messages for Workbench Tools

• Message number: 816

• Message text: &1 must not be a child element of &2

What causes this issue?

&V1& is a child element of &V2&. This is not allowed since the
agregation through &V1& in the relationship is aggregated, is an
aggregation "to 1", and a child element is already aggregated in the
original version of the view.

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?

&V1& must either be assigned under a new parent node or it must be
deleted.

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 SWDP_WB_TOOL816 - &1 must not be a child element of &2 ?

  The SAP error message SWDP_WB_TOOL816 typically indicates a problem with the structure of your Web Dynpro application. The message states that a certain element (denoted as &1) is incorrectly placed as a child of another element (denoted as &2). This usually occurs when the hierarchy of UI elements in your Web Dynpro application does not conform to the expected structure defined by the Web Dynpro framework.
  
  Cause:
  
  Incorrect Hierarchy: The most common cause of this error is that the UI element you are trying to add as a child is not allowed to be a child of the specified parent element. Each UI element in Web Dynpro has specific rules about which elements can be nested within them.
  Misconfiguration: There may be a misconfiguration in the layout or the view of your Web Dynpro application, leading to an invalid parent-child relationship.
  Version Issues: Sometimes, this error can arise due to version mismatches or inconsistencies