How To Fix WA664 - Check function module &: Parameter & is not optional

SAP Error Message - Details

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 664

• Message text: Check function module &: Parameter & is not optional

What causes this issue?

The specified parameter of the specified
<DS:GLOS.3526B0B1AFAB52B9E10000009B38F974>check function module</> is
not optional. Since it is not filled when SWE_EVENT_CREATE is called,
this is not allowed.

System Response

The action was aborted and the event was not triggered.

How to fix this error?

Define the specified parameter as optional and assign it a standard
value.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WA664 - Check function module &: Parameter & is not optional ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WA664 Check function module & : Parameter & is not optional
  
  Cause:
  This error occurs when a check function module is called with a parameter that is defined as mandatory (not optional) in the function module's interface, but the calling program or process is either not passing this parameter or passing it incorrectly (e.g., passing it as optional or leaving it blank).
  In SAP, check function modules are used to validate data or business logic. Each function module has a defined interface with parameters that can be mandatory or optional. If a mandatory parameter is missing or not supplied correctly, the system raises this error.
  
  Explanation:
  
  
  The message text contains placeholders:
  
  & (first) = Name of the check function module
  & (second) = Name of the parameter that is not optional but was not supplied
  
  
  
  The system expects the calling program to provide all mandatory parameters when calling the function module.
  
  
  
  Solution:
  
  
  Identify the function module and parameter:
  
  From the error message, note the function module name and the parameter name.
  
  
  
  Check the function module interface:
  
  Use transaction SE37 to display the function module.
  Check the parameter list and identify which parameters are mandatory (usually marked as "Import" or "Changing" parameters without default values).
  
  
  
  Review the calling program or process:
  
  Find where the function module is called.
  Ensure that the mandatory parameter is passed correctly and is not left blank or omitted.
  
  
  
  Correct the call:
  
  Modify the calling code to supply the required parameter.
  If the parameter is optional in your business context, check if the function module interface can be adjusted (not recommended unless you are sure).
  
  
  
  Test the correction:
  
  After fixing the call, test the process again to confirm the error no longer occurs.
  
  
  
  
  Additional Information:
  
  This error is common in custom developments or enhancements where check function modules are used for validations.
  Sometimes, SAP standard function modules are called incorrectly due to missing data in user exits, BADIs, or custom code.
  Always ensure that the data passed to function modules complies with the interface definition.
  If you are unsure about the parameter, check the documentation of the function module in SE37 or SAP Help.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WA664 Check function module & : Parameter & is not optional
  
  
  Cause
  Mandatory parameter not supplied in function module call
  
  
  Solution
  Pass the required parameter correctly in the calling program
  
  
  Transaction
  SE37 (to check function module interface)
  
  
  
  
  If you provide the exact function module name and parameter, I can help you with more specific guidance.