How To Fix ACE_ML003 - RFC destination &1 was not connected.

SAP Error Message - Details

• Message type: E = Error

• Message class: ACE_ML -

• Message number: 003

• Message text: RFC destination &1 was not connected.

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ACE_ML003 - RFC destination &1 was not connected. ?

  The SAP error message ACE_ML003, which states "RFC destination &1 was not connected," typically indicates that there is an issue with the Remote Function Call (RFC) connection to a specified destination in your SAP system. This can occur for various reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Causes:
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect parameters such as the target system's hostname, system number, client, user credentials, etc.
  
  
  Network Issues: There may be network connectivity issues between the SAP system and the target system. This could be due to firewall settings, network outages, or incorrect routing.
  
  
  Target System Down: The target SAP system may be down or not reachable, which would prevent a successful connection.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to connect to the target system.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running on the target system, or there may be issues with the gateway configuration.
  
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination indicated in the error message.
  Verify the configuration settings, including the target host, system number, client, user, and password.
  
  
  
  Test the Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to check if the connection can be established successfully.
  
  
  
  Check Network Connectivity:
  
  Ensure that there are no network issues preventing access to the target system. You can use tools like ping or telnet to check connectivity to the target host and port.
  
  
  
  Check Target System Status:
  
  Verify that the target SAP system is up and running. You can check the system status using transaction SM51 to see if the application servers are active.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running on the target system. You can check this using transaction SMGW.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer trace files (transaction ST22) for any additional error messages that may provide more context about the issue.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SMGW: Gateway Monitor
  SM51: List of Active Servers
  
  
  
  Documentation: Refer to SAP Help documentation for detailed information on configuring RFC destinations and troubleshooting connectivity issues.
  
  
  By following these steps, you should be able to identify and resolve the cause of the ACE_ML003 error message in your SAP system.