How To Fix /SAPAPO/CTM1807 - RFC connection is not open

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CTM1 -

• Message number: 807

• Message text: RFC connection is not open

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CTM1807 - RFC connection is not open ?

  The SAP error message /SAPAPO/CTM1807 RFC connection is not open typically indicates that there is an issue with the Remote Function Call (RFC) connection between the SAP Advanced Planning and Optimization (APO) system and another SAP system or component. This error can occur in various scenarios, such as during the execution of a planning run or when trying to access APO data.
  Causes:
  
  RFC Connection Issues: The RFC connection may not be properly configured or may be down. This can happen if the target system is not running, or if there are network issues.
  Authorization Problems: The user may not have the necessary authorizations to establish the RFC connection.
  System Configuration: The configuration settings for the RFC destination in transaction SM59 may be incorrect or incomplete.
  SAP System Down: The target SAP system may be down for maintenance or other reasons.
  Firewall or Network Issues: Firewalls or network configurations may be blocking the connection.
  
  Solutions:
  
  
  Check RFC Connection:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination that is causing the issue.
  Test the connection using the "Connection Test" option. If it fails, check the configuration settings.
  
  
  
  Review Configuration:
  
  Ensure that the RFC destination is correctly configured with the right parameters (e.g., target host, system number, client, user credentials).
  Verify that the connection type (e.g., T, 3, etc.) is appropriate for your use case.
  
  
  
  Check System Status:
  
  Ensure that the target SAP system is up and running. You can check this by logging into the target system or using transaction SM51 to see the list of active application servers.
  
  
  
  User Authorizations:
  
  Verify that the user ID being used for the RFC connection has the necessary authorizations to access the target system.
  
  
  
  Network and Firewall Settings:
  
  Check for any network issues or firewall settings that may be preventing the connection. Ensure that the necessary ports are open and that there are no restrictions on the network.
  
  
  
  SAP Notes and Support:
  
  Check for any relevant SAP Notes that may address this specific error. Sometimes, there are known issues or patches that can resolve the problem.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SM51: List of Active Application Servers
  ST22: Dump Analysis (to check for any ABAP runtime errors)
  SLG1: Application Log (to check for logs related to the error)
  
  
  
  Documentation: Refer to SAP Help documentation for more details on RFC connections and troubleshooting.
  
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.