How To Fix /IWFND/CM_DESIGNTIME004 - Remote RFC signature could not be read

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_DESIGNTIME -

• Message number: 004

• Message text: Remote RFC signature could not be read

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_DESIGNTIME004 - Remote RFC signature could not be read ?

  The SAP error message /IWFND/CM_DESIGNTIME004 Remote RFC signature could not be read typically occurs in the context of SAP Gateway and OData services. This error indicates that the system is unable to read the Remote Function Call (RFC) signature for a particular service or function module. Here are some potential causes, solutions, and related information for this error:
  Causes:
  
  Missing or Incorrect RFC Destination: The RFC destination that is supposed to connect to the backend system may be missing, incorrectly configured, or not reachable.
  Authorization Issues: The user executing the request may not have the necessary authorizations to access the RFC destination or the function module.
  Function Module Not Found: The specified function module may not exist in the backend system or may not be properly activated.
  Network Issues: There could be network connectivity issues between the SAP Gateway and the backend system.
  Version Mismatch: There may be a version mismatch between the SAP Gateway and the backend system, leading to incompatibility in function module signatures.
  
  Solutions:
  
  
  Check RFC Destination:
  
  Go to transaction SM59 and verify the configuration of the RFC destination. Ensure that it points to the correct backend system and is configured properly.
  Test the connection to ensure it is working.
  
  
  
  Verify Authorizations:
  
  Ensure that the user has the necessary authorizations to access the RFC destination and the function module. You can check this in transaction SU53 after the error occurs.
  
  
  
  Check Function Module:
  
  Verify that the function module exists in the backend system. You can do this by using transaction SE37 to search for the function module.
  Ensure that the function module is activated and has the correct interface.
  
  
  
  Network Connectivity:
  
  Check for any network issues that might be preventing communication between the SAP Gateway and the backend system. This can include firewall settings, network outages, etc.
  
  
  
  Check for Version Compatibility:
  
  Ensure that the versions of the SAP Gateway and the backend system are compatible. If there are significant version differences, consider upgrading or patching the systems.
  
  
  
  Review Logs:
  
  Check the system logs for any additional error messages that might provide more context. You can use transaction SLG1 to view application logs related to the error.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review the SAP Gateway and OData service documentation for best practices on configuration and troubleshooting.
  Community Forums: Consider checking SAP Community forums or other online resources for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify and resolve the issue causing the /IWFND/CM_DESIGNTIME004 error.