How To Fix WA661 - Check function module &: Error determining interface

SAP Error Message - Details

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 661

• Message text: Check function module &: Error determining interface

What causes this issue?

An error occurred when determining the interface of the specified
<DS:GLOS.3526B0B1AFAB52B9E10000009B38F974>check function module</>,
which could not be identified.

System Response

The action was terminated, an event was not triggered.

How to fix this error?

Check the definition of the specified check function module.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WA661 - Check function module &: Error determining interface ?

  The SAP error message:
  WA661 Check function module &: Error determining interface
  typically occurs during the generation or activation of function modules, especially in the context of function group or function module interface changes.
  
  Cause
  This error usually indicates that SAP is unable to determine or find the interface (i.e., the import, export, changing, or tables parameters) of the function module during a consistency check or activation. Possible reasons include:
  
  The function module interface is incomplete or corrupted.
  The function module is referencing an interface that does not exist or is not properly defined.
  There is a mismatch or inconsistency in the function module's interface definition in the ABAP Dictionary.
  Transport or system inconsistencies where the function module or its interface was not properly imported or activated.
  Issues with the function group or the function module's metadata.
  
  
  Solution
  
  
  Check the Function Module Interface:
  
  Go to transaction SE37.
  Enter the function module name.
  Check the Import, Export, Changing, and Tables parameters.
  Ensure all parameters are correctly defined and consistent.
  
  
  
  Re-activate the Function Module:
  
  In SE37, try to activate the function module again.
  Sometimes reactivation resolves inconsistencies.
  
  
  
  Check the Function Group:
  
  Use SE80 or SE37 to check the function group to which the function module belongs.
  Ensure the function group is active and consistent.
  
  
  
  Check for Transport or System Issues:
  
  If the function module was recently transported, verify that the transport was successful.
  Re-import or re-activate the transport if necessary.
  
  
  
  Use the SAP Note Search:
  
  Search for SAP Notes related to WA661 or function module interface errors.
  Sometimes SAP releases patches or corrections for such issues.
  
  
  
  Debug or Trace:
  
  If the error occurs during runtime or a specific process, use debugging or system trace (ST05) to identify where the interface determination fails.
  
  
  
  Recreate the Function Module:
  
  As a last resort, if the function module interface is corrupted, recreate the function module with the correct interface.
  
  
  
  
  Related Information
  
  Transaction SE37: Function Builder, used to display and maintain function modules.
  Transaction SE80: Object Navigator, useful for checking function groups and related objects.
  SAP Notes: Search for notes with keywords like "WA661", "function module interface error", or "Error determining interface".
  Function Module Interface: Consists of Import, Export, Changing, and Tables parameters that define how data is passed to and from the function module.
  Function Group: A container for function modules that share global data.
  
  
  If you provide the exact context or the function module name, more specific guidance can be given.