How To Fix SWDP_WB_TOOL236 - Value for "Selection" does not match the value of "Cardinality"

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 236

• Message text: Value for "Selection" does not match the value of "Cardinality"

What causes this issue?

You want to change the value of the property "Selection (Selection
Cardinality)" of a node to "1..1" or "1..n". The value of the property
"Cardinality", however, is "0..1" or "0..n".

System Response

The system rejects the change.

How to fix this error?

The property "Selection Cardinality" is dependent on the property
"Cardinality".

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_TOOL236 - Value for "Selection" does not match the value of "Cardinality" ?

  The SAP error message SWDP_WB_TOOL236, which states "Value for 'Selection' does not match the value of 'Cardinality'," typically occurs in the context of SAP Web Dynpro applications. This error is related to the configuration of the data model, particularly when defining the properties of UI elements or data binding.
  Cause:
  The error arises when there is a mismatch between the expected number of values (cardinality) for a particular selection and the actual number of values provided. In SAP Web Dynpro, cardinality defines how many instances of a particular data type can be associated with a UI element. For example, if a UI element is configured to accept a single value (cardinality 1), but the selection is set to allow multiple values, this inconsistency will trigger the error.
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Data Model: Review the data model associated with the Web Dynpro component. Ensure that the cardinality settings for the relevant attributes or context nodes are correctly defined.
  
  
  Adjust Selection Properties: If the selection property is set to allow multiple values (e.g., a multi-select dropdown), ensure that the cardinality of the corresponding context node or attribute is also set to allow multiple values (e.g., cardinality 0..n).
  
  
  Modify UI Element Properties: If the UI element is incorrectly configured, adjust its properties to match the expected cardinality. For instance, if a dropdown is set to allow multiple selections, ensure that the underlying data structure supports this.
  
  
  Rebuild and Test: After making the necessary adjustments, rebuild the Web Dynpro application and test it to ensure that the error no longer occurs.
  
  
  Consult Documentation: If you are unsure about the correct settings, refer to the SAP documentation or help resources for guidance on configuring cardinality and selection properties.
  
  
  Related Information:
  
  
  Cardinality Definitions: Cardinality can be defined as:
  
  0..1: Zero or one instance
  1: Exactly one instance
  0..n: Zero or more instances
  1..n: One or more instances
  
  
  
  Web Dynpro Development: Familiarize yourself with the Web Dynpro development environment, as understanding the context and data binding is crucial for resolving such issues.
  
  
  SAP Notes and Community: Check SAP Notes for any known issues or patches related to this error. Additionally, SAP Community forums can be a valuable resource for troubleshooting and finding solutions shared by other developers.
  
  
  By following these steps and understanding the underlying concepts, you should be able to resolve the SWDP_WB_TOOL236 error effectively.