How To Fix ST631 - No RFC connection could be established

ST631 - Overview

• Message type: E = Error

• Message class: ST - Terminology Database

• Message number: 631

• Message text: No RFC connection could be established

What causes this issue?

The system could not create a remote connection (such as for a where-
used query).

System Response

Under certain conditions you cannot carry out selected actions (for
example, deletion of terminology concepts).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ST631 - No RFC connection could be established ?

  The SAP error message ST631 "No RFC connection could be established" typically indicates that there is an issue with the Remote Function Call (RFC) connection between the SAP system and another system (which could be another SAP system or a non-SAP system). This error can arise 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 SAP system and the target system.
  Incorrect RFC Destination Configuration: The RFC destination 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.
  Target System Down: The target system may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the required ports for RFC communication.
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured.
  Incorrect Hostname or IP Address: The hostname or IP address