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

CRM_APO102 - Overview

• 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.

CRM_APO102 - Details

• 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