How To Fix RSDD_ZA392 - RFC connection is used by applications of another host. Adjust this

RSDD_ZA392 - Overview

• Message type: E = Error

• Message class: RSDD_ZA - Messages from TREX Aggregate Area

• Message number: 392

• Message text: RFC connection is used by applications of another host. Adjust this

What causes this issue?

The RFC connection is also being used by applications on other hosts.
This causes interferences in the various applications.

System Response

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

How to fix this error?

Manual adjustment of the RFC connection is required. Contact your system
administrator or SAP support.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD_ZA392 - RFC connection is used by applications of another host. Adjust this ?

  The SAP error message RSDD_ZA392 indicates that an RFC (Remote Function Call) connection is being used by applications from a different host than the one you are trying to access. This typically occurs in scenarios where multiple systems or applications are trying to access the same RFC destination, leading to conflicts.
  
  Cause:
  
  Multiple Applications: The RFC connection is being utilized by applications running on different hosts, which can lead to contention or conflicts.
  
  Configuration Issues: The RFC destination may not be properly configured, or there may be issues with the network or firewall settings that prevent proper communication.
  Session Limits: The maximum number of allowed sessions for the RFC connection may have been reached, causing the system to reject new connections from the current host.
  
  
  Solution:
  
  
  Check RFC Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Verify the configuration of the RFC destination that is causing the issue. Ensure that it is set up correctly and that