How To Fix SWDP_WB_TOOL202 - Only one attribute can be mapped to attribute &1

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 202

• Message text: Only one attribute can be mapped to attribute &1

What causes this issue?

You are trying to define mapping for an attribute &V1&. The original
element that is to be mapped to &V1&, however, is not an attribute but a
node or recursion node.

System Response

The system rejects the mapping function.

How to fix this error?

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

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_TOOL202 - Only one attribute can be mapped to attribute &1 ?

  The SAP error message SWDP_WB_TOOL202, which states "Only one attribute can be mapped to attribute &1," typically occurs in the context of SAP Web Dynpro development, particularly when working with the mapping of attributes in a model or view.
  Cause:
  This error arises when you attempt to map multiple attributes to a single target attribute in a Web Dynpro component. In SAP Web Dynpro, each target attribute can only be associated with one source attribute. If you try to map more than one source attribute to the same target attribute, the system will throw this error.
  Solution:
  To resolve this error, you need to review the mappings in your Web Dynpro component and ensure that each target attribute is only mapped to a single source attribute. Here are the steps to troubleshoot and fix the issue:
  
  
  Open the Web Dynpro Component: Go to the Web Dynpro component where the error is occurring.
  
  
  Check the Mappings: Navigate to the view or context node where the mappings are defined. Look for the attribute that is causing the error (indicated by &1 in the error message).
  
  
  Identify Duplicate Mappings: Check if there are multiple source attributes mapped to the same target attribute. 
  
  
  Modify the Mappings: 
  
  If you find multiple mappings, decide which source attribute should be mapped to the target attribute.
  Remove the unnecessary mappings to ensure that only one source attribute is linked to the target attribute.
  
  
  
  Save and Activate: After making the necessary changes, save your work and activate the Web Dynpro component.
  
  
  Test the Application: Run the application to ensure that the error is resolved and that the functionality works as expected.
  
  
  Related Information:
  
  Web Dynpro Documentation: Refer to the official SAP documentation for Web Dynpro for more details on attribute mapping and best practices.
  SAP Community: You can also check the SAP Community forums for discussions related to this error, as other developers may have encountered and resolved similar issues.
  Debugging Tools: Utilize debugging tools within the SAP environment to trace the execution and identify where the mapping issue occurs.
  
  By following these steps, you should be able to resolve the SWDP_WB_TOOL202 error and ensure proper attribute mapping in your Web Dynpro application.