How To Fix SWK045 - HTTP handler for starting an external service cannot be read

SAP Error Message - Details

• Message type: E = Error

• Message class: SWK - Messages for Workflow - Workplace Plug-In 4.0B

• Message number: 045

• Message text: HTTP handler for starting an external service cannot be read

What causes this issue?

This work item is a link to a HTTP service. To start the service, a
launch handler must be known to the SAP System.
However, the system could not find a launch handler.

System Response

The workflow system cannot start execution of the work item.

How to fix this error?

Contact your workflow administrator:
In Customizing you must maintain a launch handler for HTTP-supported
dialog services.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SWK045 - HTTP handler for starting an external service cannot be read ?

  The SAP error message SWK045 indicates that the system is unable to read the HTTP handler for starting an external service. This error typically arises in the context of SAP's workflow or when trying to integrate with external services via HTTP.
  Causes:
  
  Configuration Issues: The HTTP handler may not be properly configured in the SAP system. This could be due to missing or incorrect settings in the relevant configuration tables.
  Authorization Problems: The user or service account attempting to access the HTTP handler may not have the necessary authorizations.
  Service Unavailability: The external service that the HTTP handler is trying to connect to may be down or unreachable.
  Network Issues: There could be network-related issues preventing the SAP system from reaching the external service.
  Incorrect URL: The URL configured for the HTTP handler may be incorrect or malformed.
  
  Solutions:
  
  
  Check Configuration:
  
  Go to transaction SWFVISU or SWF_CONFIG to review the configuration of the HTTP handler.
  Ensure that the handler is correctly defined and that all necessary parameters are set.
  
  
  
  Review Authorizations:
  
  Check the authorizations for the user or service account that is trying to access the HTTP handler.
  Ensure that the necessary roles and permissions are assigned.
  
  
  
  Test External Service:
  
  Manually test the external service using a tool like Postman or a web browser to ensure it is up and running.
  Verify that the service is reachable from the SAP system (e.g., using ping or telnet).
  
  
  
  Check Network Configuration:
  
  Ensure that there are no firewall rules or network configurations blocking access to the external service.
  Consult with your network administrator if necessary.
  
  
  
  Validate URL:
  
  Double-check the URL configured for the HTTP handler to ensure it is correct and properly formatted.
  Make sure that the URL is accessible from the SAP system.
  
  
  
  Review Logs:
  
  Check the SAP application logs (transaction SLG1) for any additional error messages or details that could provide more context about the issue.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for workflow and HTTP services to ensure that all configurations are in line with best practices.
  Community Forums: Consider checking SAP Community forums or other technical forums for similar issues and solutions shared by other users.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance.