How To Fix WS_TOOL808 - The referenced function modules do not exist or are not RFC-enabled

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 808

• Message text: The referenced function modules do not exist or are not RFC-enabled

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS_TOOL808 - The referenced function modules do not exist or are not RFC-enabled ?

  Certainly! Here's a detailed explanation for the SAP error message WS_TOOL808: The referenced function modules do not exist or are not RFC-enabled:
  
  Error Message
  WS_TOOL808: The referenced function modules do not exist or are not RFC-enabled
  
  Cause
  This error occurs when an SAP system or tool tries to call one or more function modules remotely (via RFC - Remote Function Call), but:
  
  The specified function module(s) do not exist in the system.
  Or the function module(s) exist but are not enabled for RFC (i.e., they are not marked as remote-enabled function modules).
  Or there is a mismatch in the function module name or the system is trying to call a function module that is not released or active.
  Sometimes, this can also happen if the function module is in a different client or system and the RFC destination is not correctly configured or pointing to the wrong system.
  
  
  Explanation
  
  Function modules in SAP can be called locally or remotely.
  For remote calls, the function module must be defined as Remote-Enabled Function Module (RFC).
  If a function module is not RFC-enabled, it cannot be called from outside the system or from other SAP systems.
  Tools like SAP PI/PO, ALE, or custom programs that use RFC calls will fail with this error if the function module is missing or not RFC-enabled.
  
  
  Solution
  
  
  Check the existence of the function module:
  
  Go to transaction SE37 (Function Builder).
  Enter the function module name and check if it exists.
  If it does not exist, you need to create it or correct the function module name in your calling program/configuration.
  
  
  
  Check if the function module is RFC-enabled:
  
  In SE37, open the function module.
  Check the Attributes tab.
  Ensure the Processing Type is set to Remote-Enabled Module.
  If it is not, you need to change it to Remote-Enabled and activate the function module.
  
  
  
  Check the RFC destination:
  
  If the function module exists and is RFC-enabled, verify the RFC destination used to call it.
  Use transaction SM59 to check the RFC destination.
  Ensure it points to the correct system and client where the function module exists.
  
  
  
  Check authorization:
  
  Ensure the user used in the RFC destination has the necessary authorizations to execute the function module.
  
  
  
  Transport and system consistency:
  
  If the function module was recently created or changed, ensure it has been transported to the target system.
  Check for inconsistencies or missing transports.
  
  
  
  Check spelling and naming:
  
  Verify that the function module name is correctly spelled in the calling program or configuration.
  
  
  
  
  Related Information
  
  Transaction SE37 - Function Builder (to check and maintain function modules).
  Transaction SM59 - RFC Destinations (to check remote system connections).
  Function Module Attributes - Must be set to Remote-Enabled Module for RFC calls.
  SAP Notes - Sometimes SAP releases notes related to specific function modules or RFC issues.
  Authorization Objects - S_RFC, S_FUNCTION for RFC execution permissions.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WS_TOOL808: The referenced function modules do not exist or are not RFC-enabled
  
  
  Cause
  Function module missing or not marked as Remote-Enabled
  
  
  Solution
  Check existence, enable RFC, verify RFC destination, check authorizations
  
  
  Transactions
  SE37 (Function Builder), SM59 (RFC Destinations)
  
  
  Additional Checks
  Transport status, spelling, system/client consistency
  
  
  
  
  If you provide the exact function module name or the context where this error occurs, I can help you with more specific guidance.