How To Fix CRM_TOOL021 - This RFC can no longer be accessed externally

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_TOOL - Tool Management

• Message number: 021

• Message text: This RFC can no longer be accessed externally

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_TOOL021 - This RFC can no longer be accessed externally ?

  The SAP error message CRM_TOOL021 indicates that a Remote Function Call (RFC) cannot be accessed externally. This error typically arises in the context of SAP CRM (Customer Relationship Management) systems when there are issues related to the configuration or accessibility of RFC destinations.
  Causes:
  
  RFC Destination Configuration: The RFC destination may not be correctly configured in the SAP system. This could include incorrect settings for the target system or missing authorizations.
  Network Issues: There may be network connectivity issues preventing access to the target system.
  Authorization Issues: The user or service account attempting to access the RFC may not have the necessary authorizations.
  System Status: The target system may be down or not available for external calls.
  Firewall or Security Settings: Firewalls or security settings may be blocking the RFC call.
  
  Solutions:
  
  
  Check RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Verify the configuration of the RFC destination. Ensure that the connection type is correct and that the target system is reachable.
  Test the connection using the "Connection Test" option.
  
  
  
  Review Authorizations:
  
  Ensure that the user or service account has the necessary authorizations to execute the RFC. You can check this in transaction SU01 or PFCG.
  
  
  
  Network Connectivity:
  
  Check the network connectivity between the systems. You can use tools like ping or telnet to verify that the target system is reachable.
  
  
  
  Check System Status:
  
  Ensure that the target system is up and running. You can check the system status in the SAP system or consult with your Basis team.
  
  
  
  Firewall and Security Settings:
  
  Review any firewall rules or security settings that may be blocking the RFC call. Ensure that the necessary ports are open for communication.
  
  
  
  SAP Notes:
  
  Check for any relevant SAP Notes that may address this specific error. You can search the SAP Support Portal for updates or patches that may resolve the issue.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SU01: User Maintenance
  PFCG: Role Maintenance
  
  
  SAP Documentation: Refer to the official SAP documentation for more details on RFC configuration and troubleshooting.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.