How To Fix CRM_APO102 - Availability check: RFC connection could not be established

SAP Error Message - Details

• Message type: E = Error

• Message class: CRM_APO - Dates

• Message number: 102

• Message text: Availability check: RFC connection could not be established

What causes this issue?

Either the Server ID in the ATP system was not defined or the system is
not active.

System Response

The corresponding order can be processed, however, it is marked as
incorrect and is locked for follow-up activities.

How to fix this error?

Follow-up activity can be carried out after successful ATP check.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CRM_APO102 - Availability check: RFC connection could not be established ?

  The SAP error message "CRM_APO102 Availability check: RFC connection could not be established" typically indicates that there is an issue with the Remote Function Call (RFC) connection between the SAP CRM system and the SAP APO (Advanced Planning and Optimization) system. This error can occur due to various reasons, and here are some common causes, solutions, and related information:
  Causes:
  
  Network Issues: There may be network connectivity problems between the CRM and APO systems.
  RFC Destination Configuration: The RFC destination used for the connection may not be configured correctly in the SAP system.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  System Downtime: The APO system may be down or not reachable at the time of the request.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection between the two systems.
  Incorrect Parameters: The parameters set in the RFC destination may be incorrect (e.g., wrong hostname, port number, etc.).
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the APO system is reachable from the CRM system.
  Ensure that there are no network outages or issues.
  
  
  
  Verify RFC Destination:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination used for the connection to APO.
  Test the connection using the "Test Connection" button to see if it is successful.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations in both the CRM and APO systems.
  
  
  
  Check System Status:
  
  Verify that the APO system is up and running. You can check the system status in transaction SM51 or by contacting your Basis team.
  
  
  
  Firewall and Security Settings:
  
  Ensure that there are no firewall rules blocking the connection between the two systems. Work with your network/security team to verify this.
  
  
  
  Correct RFC Parameters:
  
  Double-check the parameters in the RFC destination configuration, including the hostname, service/port, and any other relevant settings.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages that may provide more context.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections and the CRM-APO integration.
  Documentation: Review the official SAP documentation for both CRM and APO regarding RFC connections and availability checks.
  Support: If the issue persists after troubleshooting, consider reaching out to SAP Support for further assistance.
  
  By following these steps, you should be able to identify and resolve the issue causing the "CRM_APO102 Availability check: RFC connection could not be established" error.