How To Fix OL394 - Only optional parameters are possible in this release

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 394

• Message text: Only optional parameters are possible in this release

What causes this issue?

You tried to add a mandatory parameter to a method which was created in
a previous release. However, to ensure upwards-compatibility, the
interface for a method in the current release may only be extended
using optional parameters.

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 create the parameter as an optional parameter or set the
method to 'only modeled'.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL394 - Only optional parameters are possible in this release ?

  The SAP error message OL394 ("Only optional parameters are possible in this release") typically occurs when you are trying to use a function module, method, or transaction that has been designed to accept only optional parameters, but you are providing mandatory parameters or using it in a way that is not supported in the current release of SAP.
  Cause:
  
  Incorrect Function Call: You may be calling a function module or method that has been updated in the current release to only accept optional parameters.
  Version Compatibility: The function you are trying to use may have been modified in a newer version of SAP, and the parameters you are passing are no longer valid.
  Custom Code: If you are using custom ABAP code, it may not be aligned with the current SAP version or the function module's definition.
  
  Solution:
  
  Check Documentation: Review the SAP documentation for the specific function module or method you are using. Ensure that you are aware of the parameters it accepts in the current release.
  Update Code: If you are using custom ABAP code, modify it to ensure that it only uses optional parameters as defined in the current version of the function module or method.
  Use Alternative Functions: If the function you are trying to use has been deprecated or changed significantly, look for alternative functions or methods that provide the required functionality.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this issue. There may be patches or updates that provide additional guidance or fixes.
  Testing: After making changes, thoroughly test the functionality to ensure that it works as expected without triggering the error.
  
  Related Information:
  
  SAP Release Notes: Always refer to the release notes for the specific version of SAP you are using to understand changes in function modules and methods.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered the same issue and what solutions they have found.
  ABAP Development Guidelines: Familiarize yourself with best practices in ABAP development to avoid similar issues in the future.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.