How To Fix OL392 - Inconsistent key field definition in function module &

SAP Error Message - Details

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 392

• Message text: Inconsistent key field definition in function module &

What causes this issue?

In the function module interface, either export parameters with the
same name must be defined for all key fields of the corresponding
object type (only for class methods which involve methods which create
an instance) or there can be no export parameters whose names
correspond to the key field names for the object type (instance remains
unchanged).

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?

You should change the function module accordingly and then transfer the
function again as a method.
More information about key fields can be found in the BAPI
Implementation Guide.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL392 - Inconsistent key field definition in function module & ?

  The SAP error message OL392, which states "Inconsistent key field definition in function module &," typically occurs when there is a mismatch in the key field definitions between the function module and the data structure or table it is trying to access. This inconsistency can arise from various reasons, such as changes in the data model, incorrect configuration, or issues with the function module itself.
  Causes:
  
  Data Structure Changes: If the underlying data structure or table has been modified (e.g., fields added, removed, or changed) without updating the corresponding function module, this error can occur.
  Function Module Definition: The function module may have been incorrectly defined, leading to mismatches in expected key fields.
  Transport Issues: If the function module was transported from one system to another without the corresponding data structure changes, inconsistencies may arise.
  Custom Development: If there are custom developments that interact with standard SAP function modules, they may not align with the expected key field definitions.
  
  Solutions:
  
  Check Function Module Definition: Review the function module in transaction SE37 or SE80 to ensure that the key fields are correctly defined and match the expected data structure.
  Review Data Structure: Check the data structure or table that the function module is accessing to ensure that the key fields are consistent with what the function module expects.
  Transport Consistency: If the issue arose after a transport, ensure that all related objects (data structures, tables, function modules) were transported together and are consistent across systems.
  Debugging: Use the debugger to trace the execution of the function module and identify where the inconsistency arises. This can help pinpoint the exact field or structure causing the issue.
  Consult Documentation: Review any relevant documentation or change logs to understand if there were recent changes that could have led to this inconsistency.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide guidance on resolving it.
  
  Related Information:
  
  Transaction Codes: SE37 (Function Module), SE80 (Object Navigator), SE11 (Data Dictionary).
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it involves standard SAP function modules.
  Testing: After making changes, thoroughly test the function module to ensure that it operates correctly and that the error does not reoccur.
  
  By following these steps, you should be able to identify and resolve the cause of the OL392 error in your SAP system.