How To Fix WL860 - The callback function module must be set for work items of type E

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 860

• Message text: The callback function module must be set for work items of type E

What causes this issue?

When a wait step work item (type E) was created, the parameter for the
callback function module for the callback to the workflow manager (WFM)
was not set. However, this parameter is mandatory for work items of
this type as opposed to all other work item types.

System Response

Creation of the work item was terminated.

How to fix this error?

When you create a wait step work item, always specify a callback
function module. Make sure this corresponds to the required interface.
As an example, consider the interface of the function module
SWP_CALLBACK_WI_DONE.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WL860 - The callback function module must be set for work items of type E ?

  The SAP error message WL860 indicates that a callback function module must be set for work items of type E (which typically refers to "Event" work items). This error usually occurs in the context of SAP Business Workflow when the system is trying to process a work item that requires a specific function module to handle it, but that function module has not been defined.
  Cause:
  
  Missing Callback Function Module: The most common cause of this error is that the workflow definition does not have a callback function module assigned for the specific work item type.
  Incorrect Configuration: The workflow might be incorrectly configured, leading to the absence of necessary function modules.
  Custom Development: If there are custom workflows or modifications, the required function module may not have been implemented or registered correctly.
  
  Solution:
  To resolve the WL860 error, you can follow these steps:
  
  
  Check Workflow Definition:
  
  Go to transaction code SWDD (Workflow Builder).
  Open the workflow definition that is causing the issue.
  Check the properties of the work item and ensure that a callback function module is assigned.
  
  
  
  Assign Callback Function Module:
  
  If a callback function module is not assigned, you need to assign one. This is typically done in the workflow definition under the "Work Item" settings.
  You can use standard function modules provided by SAP or create a custom one if necessary.
  
  
  
  Use Transaction SWU3:
  
  Run transaction SWU3 (Automatic Workflow Customizing) to check and adjust the workflow settings. This transaction can help ensure that all necessary configurations are in place.
  
  
  
  Check for Custom Code:
  
  If you have custom workflows, ensure that the custom function modules are correctly implemented and activated in the system.
  
  
  
  Testing:
  
  After making the necessary changes, test the workflow to ensure that the error does not occur again.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP Help documentation for detailed information on workflows and callback function modules.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  Transaction Codes:
  
  SWDD: Workflow Builder
  SWU3: Automatic Workflow Customizing
  SWI1: Work Item Selection
  SWI2_FREQ: Work Item Selection by Frequency
  
  
  
  By following these steps, you should be able to resolve the WL860 error and ensure that your workflows function correctly. If the problem persists, consider reaching out to your SAP support team for further assistance.