How To Fix SWDP_WB_TOOL573 - &1: onChange and onEnter must not be used at the same time

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 573

• Message text: &1: onChange and onEnter must not be used at the same time

What causes this issue?

Events onChange and onEnter cannot be used at the same time.

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?

The onChange event informs of all input changes that are followed by a
switch in focus. Whereas the onEnter event is only triggered if the
Enter key is pressed in the input field. You cannot use both events at
the same time.

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_TOOL573 - &1: onChange and onEnter must not be used at the same time ?

  The SAP error message SWDP_WB_TOOL573 indicates that there is a conflict in the usage of the onChange and onEnter event handlers in your Web Dynpro application. This error typically arises when both event handlers are assigned to the same UI element, which is not allowed.
  Cause:
  The error occurs because:
  
  The onChange event is triggered when the value of an input field changes and the user leaves the field (focus is lost).
  The onEnter event is triggered when the user presses the Enter key while the input field is focused.
  
  Using both event handlers simultaneously on the same UI element can lead to ambiguity in how the application should respond to user input, hence the error message.
  Solution:
  To resolve this error, you need to ensure that you are using either onChange or onEnter, but not both, for the same UI element. Here are the steps to fix the issue:
  
  
  Identify the UI Element: Locate the UI element (e.g., input field) in your Web Dynpro application where both event handlers are defined.
  
  
  Decide on the Event to Use: Determine which event handler is more appropriate for your use case:
  
  If you want to trigger an action when the user finishes entering data and leaves the field, use onChange.
  If you want to trigger an action immediately when the user presses Enter, use onEnter.
  
  
  
  Remove the Unwanted Event: Edit the properties of the UI element in the Web Dynpro component and remove the event handler that you do not need.
  
  
  Test the Application: After making the changes, test the application to ensure that it behaves as expected without throwing the error.
  
  
  Related Information:
  
  Web Dynpro Documentation: Refer to the official SAP documentation for Web Dynpro to understand the usage of event handlers and their implications.
  Debugging: If you continue to face issues, consider using debugging tools to trace the execution flow and identify where the conflicting event handlers are being set.
  Best Practices: It is generally a good practice to keep event handling simple and avoid using multiple conflicting events on the same UI element to maintain clarity and prevent errors.
  
  By following these steps, you should be able to resolve the SWDP_WB_TOOL573 error and ensure your Web Dynpro application functions correctly.