How To Fix SWF_FLEX_RUN125 - Runtime callback class could not be retrieved

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_FLEX_RUN - Workflow: Runtime Errors

• Message number: 125

• Message text: Runtime callback class could not be retrieved

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SWF_FLEX_RUN125 - Runtime callback class could not be retrieved ?

  The SAP error message SWF_FLEX_RUN125, which states "Runtime callback class could not be retrieved," typically occurs in the context of SAP Workflow. This error indicates that the system is unable to find or access the specified callback class that is required for executing a workflow task.
  Causes:
  
  Missing or Incorrect Class Implementation: The callback class that is supposed to handle the workflow task may not be implemented correctly or may be missing entirely.
  Authorization Issues: The user executing the workflow may not have the necessary authorizations to access the callback class.
  Configuration Issues: There may be misconfigurations in the workflow definition or in the associated classes.
  Transport Issues: If the workflow or its components were transported from one system to another, there may be inconsistencies or missing objects in the target system.
  System Errors: There could be underlying system issues or bugs that are preventing the retrieval of the class.
  
  Solutions:
  
  
  Check Class Implementation:
  
  Verify that the callback class exists in the system. You can do this by checking the class in the ABAP Workbench (transaction SE80 or SE24).
  Ensure that the class implements the required methods and interfaces as expected by the workflow.
  
  
  
  Review Workflow Configuration:
  
  Check the workflow definition in transaction SWDD (Workflow Builder) to ensure that the callback class is correctly assigned to the relevant task.
  Make sure that the task is correctly configured and activated.
  
  
  
  Authorization Check:
  
  Ensure that the user executing the workflow has the necessary authorizations to access the callback class. You can check this using transaction SU53 or by reviewing the user's roles and authorizations.
  
  
  
  Transport Consistency:
  
  If the issue arose after a transport, verify that all necessary objects (including the callback class and any dependencies) were transported correctly.
  Check for any missing objects in the target system.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the workflow execution to identify where the failure occurs. You can use transaction SWI1 to monitor workflow instances and analyze the logs.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be known issues or patches available.
  
  
  
  System Logs:
  
  Review system logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the issue.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SWDD: Workflow Builder
  SWI1: Work Item Selection
  SE80: Object Navigator
  SE24: Class Builder
  SU53: Authorization Check
  SLG1: Application Log
  
  
  
  Documentation: Refer to SAP Help documentation for workflows and ABAP classes for more detailed information on implementing and troubleshooting workflows.
  
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.