How To Fix EU167 - Only page nodes can reference existing nodes

SAP Error Message - Details

• Message type: E = Error

• Message class: EU - Development Environment

• Message number: 167

• Message text: Only page nodes can reference existing nodes

What causes this issue?

You attempted to assign a node name that already exists in the
hierarchy. Although you are working in a mode which allows you to
reference existing nodes, this applies only to nodes that have no
dependent nodes themselves.

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?

Choose another name or ensure (e.g. by reassigning) that the node
becomes a 'leaf' node. Then, you can reference the original node.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EU167 - Only page nodes can reference existing nodes ?

  The SAP error message EU167, which states "Only page nodes can reference existing nodes," typically occurs in the context of SAP's Web Dynpro or UI5 applications when there is an issue with the structure of the application’s view or component configuration. This error indicates that there is an attempt to reference a node that is not allowed in the current context, often due to incorrect hierarchy or node types.
  Cause:
  
  Incorrect Node Reference: The error usually arises when a non-page node (like a context node that is not a page node) is being referenced in a way that is only valid for page nodes.
  Hierarchy Issues: The structure of the context nodes may not be set up correctly, leading to invalid references.
  Configuration Errors: There may be issues in the configuration of the Web Dynpro component or the UI5 application, where nodes are not properly defined or linked.
  
  Solution:
  
  Check Node Types: Review the context nodes in your Web Dynpro or UI5 application. Ensure that the nodes you are trying to reference are indeed page nodes. If they are not, you may need to adjust your application logic to reference the correct type of node.
  Review Context Structure: Examine the context structure in the component controller and ensure that the hierarchy is correctly defined. Make sure that the nodes are properly set up to allow for the intended references.
  Adjust References: If you find that you are incorrectly referencing a non-page node, modify your code to reference a valid page node instead.
  Debugging: Use debugging tools to trace the execution flow and identify where the invalid reference is being made. This can help pinpoint the exact location in the code that is causing the error.
  Documentation and Examples: Refer to SAP documentation or examples related to context node management in Web Dynpro or UI5 to ensure that you are following best practices.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Community Forums: Engage with SAP community forums or discussion groups where similar issues may have been discussed.
  SAP Help Portal: Utilize the SAP Help Portal for detailed documentation on Web Dynpro and UI5 context management.
  
  By following these steps, you should be able to resolve the EU167 error and ensure that your application is correctly referencing the appropriate nodes.