How To Fix WS_TOOL857 - Function &1: &2 parameter &3 was changed to "not optional"

SAP Error Message - Details

• Message type: E = Error

• Message class: WS_TOOL - Message Class for Web Services and Virtual Endpoints

• Message number: 857

• Message text: Function &1: &2 parameter &3 was changed to "not optional"

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS_TOOL857 - Function &1: &2 parameter &3 was changed to "not optional" ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WS_TOOL857 Function &1: &2 parameter &3 was changed to "not optional"
  
  Meaning / 
  Cause:
  This message occurs when a function module's interface parameter, which was previously defined as optional, has been changed to not optional (mandatory). In other words, the parameter that could be omitted before now must be supplied when calling the function module.
  This typically happens during transport or import of function module changes, or when the function module interface is modified in the development system and then transported to other systems.
  
  Why is this a problem?
  
  Changing a parameter from optional to mandatory is a non-compatible interface change.
  Existing programs or function calls that do not supply this parameter will now fail or behave unexpectedly.
  SAP tools (like the Function Builder or transport tools) detect this change and issue this warning/error to alert developers/administrators.
  
  
  Solution / How to fix:
  
  
  Review the change:
  
  Confirm that the change