How To Fix UCM0166 - RFC destination &2 points to local system

SAP Error Message - Details

• Message type: E = Error

• Message class: UCM0 - Messages for Data Basis, Cons Area, ...

• Message number: 166

• Message text: RFC destination &2 points to local system

What causes this issue?

RFC destination &V2& points to the current login client in the local
system (&V3&). However, in this case you do not need to specify an RFC
destination.

System Response

The system is unable to ensure the transactional integrity of posting
transaction data when an RFC destination is used.

How to fix this error?

If there is no special reason for using an RFC destination, retract this
setting.

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 UCM0166 - RFC destination &2 points to local system ?

  The SAP error message UCM0166 indicates that the RFC (Remote Function Call) destination specified is pointing to the local system instead of a remote system. This can occur in various scenarios, particularly when configuring connections between different SAP systems or when trying to access services that require a remote connection.
  Cause:
  
  Incorrect RFC Destination Configuration: The RFC destination may be incorrectly configured to point to the local system (localhost) instead of the intended remote system.
  Network Issues: There may be network connectivity issues preventing the system from reaching the intended remote destination.
  Missing or Incorrect Parameters: The parameters in the RFC destination configuration (like the target host, system number, client, etc.) may be missing or incorrect.
  Authorization Issues: The user may not have the necessary authorizations to access the remote system.
  
  Solution:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination that is causing the error.
  Verify that the target host and system number are correctly configured to point to the intended remote system.
  Ensure that the connection type is appropriate (e.g., TCP/IP).
  
  
  
  Test the Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to check if the connection to the remote system is successful.
  If the connection fails, review the error message for further details.
  
  
  
  Review Network Settings:
  
  Ensure that there are no firewall or network issues preventing access to the remote system.
  Check if the remote system is up and running.
  
  
  
  Check User Authorizations:
  
  Ensure that the user account being used to access the remote system has the necessary authorizations.
  Review the roles and profiles assigned to the user.
  
  
  
  Consult Documentation:
  
  If the issue persists, consult SAP documentation or support for further troubleshooting steps specific to your system configuration.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SICF: Maintain HTTP Services (if applicable)
  SU01: User Maintenance (to check user authorizations)
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to RFC destinations and connectivity.
  
  
  Logs: Review system logs (transaction SM21) for any additional error messages that may provide more context about the issue.
  
  
  By following these steps, you should be able to identify and resolve the cause of the UCM0166 error message in your SAP system.