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

SAP Error Message - Details

• 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 implementation uses a classic BAdI interface (based on IF_BADI_INTERFACE) and another uses a new BAdI interface (based on IF_BADI or filter-dependent interfaces), the system cannot reconcile these differences, leading to the WA523 error.
  
  Solution:
  
  
  Check Implementations:
  
  Go to transaction SE18 (BAdI Builder) or SE19 (BAdI Implementation).
  Review all implementations of the BAdI or enhancement in question.
  Verify the interface type used by each implementation.
  
  
  
  Align Interface Types:
  
  Ensure all implementations use the same interface type.
  If some implementations are classic and others are new, consider migrating classic implementations to the new interface type or vice versa, depending on your SAP system version and requirements.
  
  
  
  Deactivate or Remove Incompatible Implementations:
  
  If certain implementations cannot be aligned, deactivate or delete the incompatible ones to maintain consistency.
  
  
  
  Check Enhancement Implementations:
  
  For enhancement framework implementations (transaction SE20), ensure that all enhancement implementations for a given enhancement spot use the same interface type.
  
  
  
  Transport and System Consistency:
  
  Sometimes, inconsistencies arise due to transport issues or partial imports. Ensure all related transports are imported correctly and completely.
  
  
  
  Consult SAP Notes:
  
  Check SAP Support Portal for any relevant SAP Notes that might address this issue for your specific SAP version.
  
  
  
  
  Related Information:
  
  
  BAdI Types:
  
  Classic BAdI (older interface, based on IF_BADI_INTERFACE)
  New BAdI (introduced with Enhancement Framework, based on IF_BADI)
  Filter-dependent BAdI (new BAdI with filtering capabilities)
  
  
  
  Transactions:
  
  SE18 - BAdI Builder (definition)
  SE19 - BAdI Implementation
  SE20 - Enhancement Implementation
  
  
  
  SAP Documentation:
  
  SAP Help Portal on BAdIs and Enhancement Framework
  SAP Notes related to BAdI interface compatibility
  
  
  
  
  Summary:
  WA523 error means that the system found multiple BAdI or enhancement implementations that do not share the same interface type. To fix this, ensure all implementations use the same interface type by reviewing and aligning their definitions, deactivating incompatible implementations, and verifying system consistency.
  
  If you provide the exact context (e.g., which BAdI or enhancement, SAP version), I can help with more specific guidance.