How To Fix SWF_RUN637 - Error when starting submethod

SAP Error Message - Details

• Message type: E = Error

• Message class: SWF_RUN - Workflow Runtime System

• Message number: 637

• Message text: Error when starting submethod

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 SWF_RUN637 - Error when starting submethod ?

  The SAP error message SWF_RUN637, which indicates an error when starting a submethod, typically occurs in the context of SAP Business Workflow. This error can arise due to various reasons, including configuration issues, missing or incorrect parameters, or problems with the workflow definition itself.
  Causes:
  
  Incorrect Workflow Configuration: The workflow might not be properly configured, leading to issues when trying to start a submethod.
  Missing or Incorrect Parameters: The submethod may require certain parameters that are not being passed correctly or are missing altogether.
  Authorization Issues: The user executing the workflow may not have the necessary authorizations to start the submethod.
  Technical Errors: There could be underlying technical issues, such as problems with the underlying function modules or methods being called.
  Versioning Issues: If there are multiple versions of the workflow or submethod, the system might be trying to execute an outdated or incorrect version.
  
  Solutions:
  
  Check Workflow Configuration: Review the workflow definition and ensure that all steps, including submethods, are correctly configured.
  Verify Parameters: Ensure that all required parameters for the submethod are being passed correctly. You can check the workflow log for details on what parameters are being sent.
  Review Authorizations: Check the user’s authorizations to ensure they have the necessary permissions to execute the workflow and submethod.
  Debugging: Use transaction SWI1 (Work Item Selection) to analyze the workflow instance and check for any runtime errors. You can also use transaction SWI2_FREQ to find frequent errors.
  Check for Technical Issues: Look into the function modules or methods being called by the submethod for any issues. You may need to debug the code to identify the root cause.
  Update Workflow: If there are versioning issues, ensure that the latest version of the workflow and submethod is active and being used.
  
  Related Information:
  
  Transaction Codes: 
  
  SWI1: Work Item Selection
  SWI2_FREQ: Frequent Errors
  SWI2_DURA: Duration Analysis
  
  
  Workflow Logs: Check the workflow logs for detailed error messages and stack traces that can provide more context on the issue.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to SWF_RUN637.
  Documentation: Review SAP documentation on Business Workflow for best practices and troubleshooting tips.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or Workflow team for further assistance.