How To Fix WK304 - Error in control dispatch

SAP Error Message - Details

• Message type: E = Error

• Message class: WK - BPT: Messages integr. inbox

• Message number: 304

• Message text: Error in control dispatch

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WK304 - Error in control dispatch ?

  SAP Error Message:
  
  WK304 - Error in control dispatch
  
  Cause:
  The error message WK304 - Error in control dispatch typically occurs in the SAP Workflow module. It indicates that there is a problem during the processing or dispatching of a workflow control step. This can happen due to several reasons, such as:
  
  Incorrect or missing configuration in the workflow control step.
  Issues with the workflow container or binding.
  Problems in the workflow task or method being called.
  Authorization issues preventing the dispatch.
  Runtime errors in the workflow processing logic.
  System inconsistencies or missing objects related to the workflow.
  
  
  Explanation:
  In SAP Workflow, a "control dispatch" refers to the system's attempt to execute or trigger a control step (like a method call, event, or task). If the system encounters an error during this dispatch, it raises WK304.
  
  Common Causes in Detail:
  
  
  Incorrect Workflow Step Configuration:
  
  The control step might be configured with incorrect parameters or missing required data.
  
  
  Binding Issues:
  
  The workflow container variables might not be properly bound to the step's parameters.
  
  
  Missing or Inactive Workflow Objects:
  
  The task, method, or event being called might be inactive or deleted.
  
  
  Authorization Problems:
  
  The user or system might lack the necessary authorizations to execute the step.
  
  
  Runtime Errors in Custom Code:
  
  If the control step calls custom code (e.g., a method in a class), errors in that code can cause dispatch failure.
  
  
  System or Transport Issues:
  
  Incomplete transports or inconsistencies in the workflow repository.
  
  
  
  Solution / Troubleshooting Steps:
  
  
  Check Workflow Logs:
  
  Use transaction SWI1 (Workflow Log) or SWI2_FREQ to analyze the workflow instance and identify the exact step causing the error.
  
  
  Analyze the Error Details:
  
  In the workflow log, look for the detailed error message and stack trace to understand the root cause.
  
  
  Verify Step Configuration:  
  
  Open the workflow in SWDD (Workflow Builder).  
  Check the control step configuration, parameters, and bindings.
  
  
  
  Check Workflow Objects:  
  
  Ensure that the tasks, methods, and events used in the step are active and correctly defined.  
  Use transactions like PFTC (Task Maintenance) and SE24 (Class Builder) to verify.
  
  
  
  Check Authorizations:  
  
  Verify that the user executing the workflow has the necessary authorizations.  
  Use SU53 after the error occurs to check authorization failures.
  
  
  
  Debug the Workflow:  
  
  Use SWUD or set breakpoints in the ABAP code called by the workflow to debug runtime errors.
  
  
  
  Check System Logs:  
  
  Use SM21 and ST22 to check for system dumps or errors related to the workflow.
  
  
  
  Reimport or Repair Workflow Objects:  
  
  If the workflow objects are inconsistent, reimport or repair them via transport or manual correction.
  
  
  
  SAP Notes and Support:  
  
  Search for SAP Notes related to WK304 for known bugs or patches.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SWI1 - Workflow Log
  SWI2_FREQ - Workflow Runtime Errors
  SWDD - Workflow Builder
  PFTC - Task Maintenance
  SU53 - Authorization Check
  SM21 - System Log
  ST22 - ABAP Runtime Errors
  
  
  
  SAP Help and Documentation:
  
  Refer to SAP Help Portal for Workflow error handling and troubleshooting.
  
  
  Common SAP Notes:
  
  Search SAP Support Portal for notes mentioning WK304 or workflow dispatch errors.
  
  
  
  Summary:
  WK304 - Error in control dispatch is a workflow runtime error indicating a failure in executing a control step. The resolution involves analyzing the workflow log, verifying step configuration, checking authorizations, debugging any custom code, and ensuring all workflow objects are active and consistent.
  
  If you provide the exact workflow scenario or additional error details, I can help with more specific guidance.