How To Fix WS_TOOL171 - No authorization (ICF-node)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 171

• Message text: No authorization (ICF-node)

Self-Explanatory Message

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• What is the cause and solution for SAP error message WS_TOOL171 - No authorization (ICF-node) ?

  SAP Error Message:
  
  WS_TOOL171 No authorization (ICF-node)
  
  Cause:
  This error occurs when a user tries to access a specific Internet Communication Framework (ICF) service (also called an ICF node) in the SAP system but does not have the necessary authorization to do so. The ICF node represents a web service or HTTP service in SAP, and access to these nodes is controlled by authorizations.
  
  Explanation:
  
  The ICF framework is used in SAP to handle HTTP and HTTPS requests.
  Each ICF node corresponds to a service or application endpoint.
  Access to these nodes is protected by authorization objects.
  If the user’s role does not include the required authorization for the ICF node, the system throws the WS_TOOL171 error.
  
  
  Solution:
  
  
  Identify the ICF node causing the issue:
  
  The error message or the transaction you are trying to run usually indicates the ICF node.
  You can also check the HTTP request URL or the SAP transaction that triggers the error.
  
  
  
  Check the authorization object:
  
  The relevant authorization object is usually S_ICF (Authorization for ICF services).
  This object controls access to ICF nodes.
  
  
  
  Grant the required authorization:
  
  Use transaction PFCG (Role Maintenance).
  Open the user’s role(s).
  Add or adjust the authorization for S_ICF to include the ICF node path.
  
  For example, if the ICF node is /sap/bc/ui5_ui5, ensure this path is included in the role.
  
  
  Generate and assign the updated role to the user.
  
  
  
  Activate the ICF node (if necessary):
  
  Use transaction SICF.
  Navigate to the node in question.
  Check if the node is active.
  If inactive, activate it.
  
  
  
  Test the access again:
  
  After updating the authorization and activating the node, test the service or transaction again.
  
  
  
  
  Additional Information:
  
  Transaction SICF: Used to manage and activate ICF services.
  Authorization Object S_ICF: Controls access to ICF nodes. Fields include:
  
  SERVICE (ICF service name)
  ACTVT (Activity, e.g., 16 for execute)
  
  
  Sometimes, the error can also occur if the ICF node is inactive or incorrectly configured.
  If the user has the correct authorization but still faces the issue, check for:
  
  Role assignment correctness.
  User master record validity.
  System cache issues (try to clear the cache or restart the ICF service).
  
  
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  User lacks authorization for the requested ICF node (web service endpoint).
  
  
  Solution
  Grant authorization for the ICF node via S_ICF in user roles (PFCG), activate node in SICF.
  
  
  Related Transactions
  SICF (ICF service maintenance), PFCG (Role maintenance)
  
  
  Authorization Object
  S_ICF (controls access to ICF nodes)
  
  
  
  
  If you need help identifying the exact ICF node or authorization, you can enable trace or check system logs (transaction SM21, ST22) for more details.