How To Fix WS_TOOL133 - Error while checking an available ICF node

SAP Error Message - Details

• Message type: E = Error

• Message class: WS_TOOL - Message Class for Web Services and Virtual Endpoints

• Message number: 133

• Message text: Error while checking an available ICF node

Self-Explanatory Message

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• What is the cause and solution for SAP error message WS_TOOL133 - Error while checking an available ICF node ?

  SAP Error Message:
  
  WS_TOOL133 Error while checking an available ICF node
  
  Cause
  This error typically occurs when the SAP system tries to verify or access an Internet Communication Framework (ICF) node, but the node is either not available, not active, or there is a communication problem with the ICF service.
  Common causes include:
  
  The ICF node (service) is not activated or does not exist.
  The SAP Web Dispatcher or ICM (Internet Communication Manager) is not running or misconfigured.
  Network or authorization issues preventing access to the ICF node.
  Incorrect URL or service path used in the check.
  Transport or system inconsistencies after system copy or upgrade.
  
  
  Explanation
  The ICF (Internet Communication Framework) is the SAP framework for handling HTTP(S) requests. Many SAP web services, Web Dynpro applications, and Fiori apps rely on ICF nodes being active and reachable.
  When a tool or transaction tries to check the availability of an ICF node (e.g., during configuration or runtime), it sends a request to the node. If the node is inactive or unreachable, the system raises the WS_TOOL133 error.
  
  Solution
  
  
  Check and Activate the ICF Node:
  
  Go to transaction SICF.
  Enter the service path related to the error or the service you want to check.
  Right-click the node and select Activate Service if it is inactive.
  Test the service by right-clicking and choosing Test Service.
  
  
  
  Verify ICM and Web Dispatcher:
  
  Ensure the ICM (Internet Communication Manager) is running.
  
  Use transaction SMICM to check the status.
  Restart ICM if necessary.
  
  
  If using SAP Web Dispatcher, verify it is running and properly configured.
  
  
  
  Check Network and Authorization:
  
  Verify that the user executing the check has the necessary authorizations.
  Check network connectivity between the client and the SAP server.
  Ensure no firewall or proxy is blocking the HTTP(S) requests.
  
  
  
  Check URL and Service Path:
  
  Confirm that the URL or service path used to check the ICF node is correct.
  Sometimes, after system copies or landscape changes, URLs may need adjustment.
  
  
  
  Review System Logs:
  
  Use transaction SM21 and ST22 to check for related system errors or dumps.
  Check ICM trace files for communication errors.
  
  
  
  After System Copy or Upgrade:
  
  Re-activate all necessary ICF nodes as some may be inactive after system copy.
  Run report RSICFGEN to regenerate ICF services if needed.
  
  
  
  
  Related Information
  
  Transaction SICF: Main transaction to manage ICF services.
  Transaction SMICM: Monitor and control the Internet Communication Manager.
  SAP Note references (if available) for specific versions or scenarios.
  ICF nodes are essential for SAP Web services, Fiori Launchpad, Web Dynpro, and other HTTP-based services.
  Proper activation and configuration of ICF nodes are critical for SAP web functionality.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  ICF node inactive, missing, or unreachable due to configuration, network, or authorization issues.
  
  
  Solution
  Activate ICF node in SICF, ensure ICM/Web Dispatcher is running, verify network and authorizations, check URLs.
  
  
  Tools
  SICF, SMICM, SM21, ST22, RSICFGEN
  
  
  Notes
  After system copy or upgrade, re-activation of ICF nodes may be necessary.
  
  
  
  
  If you provide the exact context or transaction where this error occurs, I can help with more tailored troubleshooting steps.