How To Fix WA523 - All modules must support the same type of interface

WA523 - Overview

• Message type: E = Error

• Message class: WA - Messages from Workflow Event Manager

• Message number: 523

• Message text: All modules must support the same type of interface

What causes this issue?

You have entered several function modules that are to be called when
the event is created from a change document.
There are different types of interface for each of these function
modules, since classes can be processed as well as BOR objects. So that
the existing function modules can continue to be used, new variants
have been developed for the interfaces of these function modules.
On the basis of the interface of the relevant function module, an
indicator is assigned, which can be used at runtime to control which
interface variant is used to call the function module. The function
modules entered must, however, have the same interface indicator.

System Response

The function module entry is not accepted.

How to fix this error?

Only enter function modules that have the same interface indicator. In
the function group <AB>SWE_TEMPLATE</>, you will find function modules
that describe the various variants of the interfaces. If the function
modules end with the same digit, they have the same interface
indicator.
Templates for the function module for the object type are:
SWE_CD_TEMPLATE_OBJTYPE_FB
SWE_CD_TEMPLATE_OBJTYPE_FB_2

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WA523 - All modules must support the same type of interface ?

  SAP Error Message:
  WA523 - All modules must support the same type of interface
  
  
  Cause:
  This error occurs during the configuration or activation of a Business Add-In (BAdI) or enhancement implementation in SAP when the system detects that the modules (implementations) involved do not support the same type of interface. In other words, the BAdI or enhancement expects all its implementations to use a consistent interface type (e.g., classic BAdI interface, new BAdI interface, or filter-dependent interface), but the system finds a mismatch.
  Typical scenarios include:
  
  Mixing classic BAdI implementations with new BAdI implementations.
  Implementations using different interface definitions or incompatible interface types.
  Attempting to activate or use multiple enhancement implementations that are not aligned in their interface type.
  
  
  Explanation:
  SAP BAdIs and enhancement frameworks require that all implementations of a particular BAdI or enhancement use the same interface type to ensure consistent behavior and compatibility. The interface defines the methods and parameters that the implementations must follow.
  If one