How To Fix SWDP_WB_TOOL245 - Node &1: Collection type &2 is not allowed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 245

• Message text: Node &1: Collection type &2 is not allowed

What causes this issue?

Possible values for the collection type are collection, quantity, list,
and tree. These values have the internal codes 01, 02, 03, and 04.
Currently, only the collection type List (03) is allowed.
The node &V1&, however, has a collection type with the internal code
&V2&.

System Response

Error message of the syntax analysis.

How to fix this error?

Assign the node an allowed collection type.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message SWDP_WB_TOOL245 - Node &1: Collection type &2 is not allowed ?

  The SAP error message SWDP_WB_TOOL245, which states "Node &1: Collection type &2 is not allowed," typically occurs in the context of SAP Web Dynpro development. This error indicates that there is an issue with the type of collection being used in a specific node of your Web Dynpro component.
  Cause:
  The error is usually caused by one of the following reasons:
  
  Invalid Collection Type: The collection type specified for a node is not compatible with the expected type. For example, if a node is expected to be a table but is defined as a single entity or vice versa.
  Incorrect Configuration: The configuration of the node in the Web Dynpro component might not align with the data model or the underlying data structure.
  Data Binding Issues: There may be issues with how data is bound to the node, leading to an invalid collection type being referenced.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Node Configuration:
  
  Open the Web Dynpro component in the Web Dynpro Workbench.
  Navigate to the node that is causing the error (indicated by &1 in the error message).
  Verify the collection type defined for the node. Ensure that it matches the expected type (e.g., if it should be a table, ensure it is defined as a table).
  
  
  
  Review Data Model:
  
  Ensure that the data model you are using is correctly defined and that the node's structure aligns with the data being processed.
  If you are using a context node, check the associated data source and ensure it is returning the correct type of data.
  
  
  
  Adjust Data Binding:
  
  If the node is bound to a data source, check the binding settings to ensure they are correct.
  Make sure that the data being passed to the node is in the expected format.
  
  
  
  Recreate the Node:
  
  If the issue persists, consider deleting the problematic node and recreating it with the correct settings.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date with the latest patches and updates, as sometimes bugs in earlier versions can lead to such errors.
  
  
  
  Related Information:
  
  Web Dynpro Documentation: Refer to the official SAP documentation for Web Dynpro to understand the expected configurations for nodes and collections.
  SAP Community: Check forums and community discussions for similar issues and solutions shared by other developers.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify and resolve the issue causing the SWDP_WB_TOOL245 error in your SAP Web Dynpro application.