How To Fix W8190 - Field or field value restrictions are only valid for "change" event &

SAP Error Message - Details

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 190

• Message text: Field or field value restrictions are only valid for "change" event &

What causes this issue?

It is only worth defining field and field value restrictions if the
event is created when a "change" occurs.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message W8190 - Field or field value restrictions are only valid for "change" event & ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  W8190 - Field or field value restrictions are only valid for "change" event &
  
  Cause:
  This warning message occurs when you try to define field or field value restrictions in a context other than the "change" event in a screen or module pool programming.
  
  In SAP Dynpro programming, field restrictions (like making a field input-enabled or not, or restricting certain field values) are typically valid only during the PBO (Process Before Output) or PAI (Process After Input) events, specifically during the "change" event.
  If you attempt to apply these restrictions in other events (e.g., "value request", "help", or any event other than "change"), the system issues this warning.
  The system expects that field restrictions are handled only when the user changes the field value, i.e., during the "change" event.
  
  
  Explanation:
  
  The "change" event is triggered when the user modifies the content of a field.
  Field or field value restrictions (like setting INPUT property, or restricting allowed values) are designed to be applied when the field content changes.
  Applying these restrictions outside the "change" event does not make sense logically and is therefore not allowed.
  
  
  Solution:
  
  
  Check the event in which you are applying the field or field value restrictions.
  
  
  Make sure that the code that sets these restrictions is placed inside the "change" event handler of the screen or module pool.
  
  
  If you are trying to restrict fields in other events, reconsider your logic or move the restriction code to the "change" event.
  
  
  Example:  
  MODULE fieldname INPUT.
    " Your field restriction logic here
  ENDMODULE.
  This module is triggered during the "change" event of the field.
  
  
  If you want to restrict fields during PBO, use other methods like setting the INPUT property directly in the PBO module, but avoid using field value restrictions outside the "change" event.
  
  
  
  Related Information:
  
  SAP Screen Programming (Dynpro) Events:
  
  PBO (Process Before Output): Prepare screen before it is displayed.
  PAI (Process After Input): Process user input after screen interaction.
  Field Events: "INPUT", "VALUE REQUEST", "HELP", "CHANGE", etc.
  
  
  Field Restrictions: Used to control input, visibility, or allowed values of screen fields.
  SAP Note / Documentation: Check SAP documentation on screen programming and field events for more details.
  Transaction SE80 or SE41: To check screen flow logic and event handling.
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Field restrictions applied outside "change" event.
  
  
  Effect
  Warning W8190 is raised.
  
  
  Solution
  Apply field or field value restrictions only in the "change" event.
  
  
  Additional
  Review screen event handling and adjust code accordingly.
  
  
  
  
  If you need help with a specific code snippet or screen, feel free to provide it!