How To Fix WAB021 - Internal error: BAdI implementation for filter & missing

WAB021 - Overview

• Message type: E = Error

• Message class: WAB - Messages Settlement Management

• Message number: 021

• Message text: Internal error: BAdI implementation for filter & missing

What causes this issue?

For the filter type &V1&, no implementation exists for BAdI
WLF_ACCOUNTING_CREATE_LINE.

System Response

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

How to fix this error?

This issue should not occur. Contact your system administrator. This may
be a program error.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WAB021 - Internal error: BAdI implementation for filter & missing ?

  SAP Error Message:
  WAB021 Internal error: BAdI implementation for filter & missing
  
  Cause
  This error occurs when the SAP system expects a Business Add-In (BAdI) implementation for a specific filter value, but no implementation is found or assigned. In other words, the system is trying to execute a BAdI with a particular filter criterion, but the corresponding implementation that matches this filter is missing.
  This typically happens in scenarios where:
  
  A BAdI is defined with filter-dependent implementations.
  The filter value used at runtime does not have an associated implementation.
  The BAdI implementation was not created or activated for the required filter value.
  The filter value passed is incorrect or not maintained.
  
  
  Explanation
  
  BAdI (Business Add-In): A SAP enhancement technique that allows custom code to be inserted into standard SAP programs.
  Filter-dependent BAdI: A BAdI that can have multiple implementations, each assigned to a specific filter value. At runtime, the system selects the implementation based on the filter value.
  If the system cannot