How To Fix UGBW005 - No connection could be established with target system &1

SAP Error Message - Details

• Message type: E = Error

• Message class: UGBW - Messages for FI/BW Interface

• Message number: 005

• Message text: No connection could be established with target system &1

What causes this issue?

A connection to target system &V1& could not be established.

System Response

Processing terminated

How to fix this error?

Make sure that the following prerequisites are given:
The target system is running and can be logged into.
The logical destination is correctly defined, and remote logins are
possible.
If the problem persists, please notify SAP.

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 UGBW005 - No connection could be established with target system &1 ?

  The SAP error message UGBW005, which states "No connection could be established with target system &1," typically indicates that there is an issue with the connection between your SAP system and the target system specified in the error message. This can occur in various scenarios, such as when trying to connect to a remote system for data transfer, RFC (Remote Function Call), or other integration purposes.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system. This could be due to firewalls, routing issues, or network outages.
  Incorrect Configuration: The connection settings (such as the RFC destination) may be incorrectly configured in the SAP system. This includes incorrect hostnames, IP addresses, or port numbers.
  Target System Down: The target system may be down or not reachable due to maintenance or other issues.
  Authorization Issues: The user credentials used to establish the connection may not have the necessary authorizations to access the target system.
  SAP Gateway Issues: The SAP Gateway service may not be running or properly configured on either the source or target system.
  Protocol Mismatch: There may be a mismatch in the communication protocols being used (e.g., HTTP vs. HTTPS).
  
  Solutions:
  
  Check Network Connectivity: Use tools like ping or traceroute to verify that the target system is reachable from the SAP system. Ensure that there are no firewalls blocking the connection.
  Verify RFC Destination: Go to transaction SM59 in the SAP GUI and check the configuration of the RFC destination. Ensure that the hostname, port, and other settings are correct.
  Check Target System Status: Ensure that the target system is up and running. If it is down, coordinate with the relevant team to bring it back online.
  Review User Authorizations: Ensure that the user credentials used for the connection have the necessary authorizations to access the target system.
  Check SAP Gateway: Ensure that the SAP Gateway service is running on both systems. You can check this in transaction SMGW.
  Test Connection: In transaction SM59, you can test the connection to the target system to see if it is successful. This can help identify if the issue is with the configuration or the network.
  Review Logs: Check the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that might provide more context on the issue.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for configuring RFC connections and troubleshooting connectivity issues.
  Community Forums: Consider searching or posting on SAP community forums for additional insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the UGBW005 error effectively.