How To Fix 04101 - Connection to &: TCP/IP error

SAP Error Message - Details

• Message type: E = Error

• Message class: 04 -

• Message number: 101

• Message text: Connection to &: TCP/IP error

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 04101 - Connection to &: TCP/IP error ?

  The SAP error message "04101 Connection to &: TCP/IP error" typically indicates that there is a problem with the network connection between the SAP application server and the database or another system it is trying to connect to. This error can arise from various issues, including network configuration problems, firewall settings, or incorrect connection parameters.
  Causes:
  
  Network Issues: There may be a problem with the network connection, such as a downed network link or misconfigured network settings.
  Firewall Restrictions: Firewalls may be blocking the necessary ports for SAP communication.
  Incorrect Connection Parameters: The connection parameters (like hostname, port number, or service name) may be incorrectly configured in the SAP system.
  Database Server Down: The database server that SAP is trying to connect to may be down or not reachable.
  SAP Instance Not Running: The SAP instance you are trying to connect to may not be running or may have crashed.
  DNS Resolution Issues: The hostname may not be resolving correctly due to DNS issues.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to check if the SAP server can reach the database server or other systems.
  Ensure that the network is functioning properly.
  
  
  
  Verify Connection Parameters:
  
  Check the connection parameters in the SAP configuration (e.g., tnsnames.ora for Oracle databases) to ensure they are correct.
  Make sure the hostname and port number are accurate.
  
  
  
  Firewall Configuration:
  
  Ensure that the necessary ports are open on the firewall for SAP communication.
  Consult with your network administrator to verify firewall settings.
  
  
  
  Check Database Server Status:
  
  Verify that the database server is up and running.
  Check the database logs for any errors that might indicate why it is not reachable.
  
  
  
  Restart SAP Services:
  
  If the SAP instance is not responding, consider restarting the SAP services or the entire server.
  
  
  
  DNS Configuration:
  
  Ensure that the DNS settings are correct and that the hostname can be resolved to the correct IP address.
  You can test this by using the nslookup command.
  
  
  
  Review SAP Logs:
  
  Check the SAP application logs (transaction SM21) for any additional error messages that might provide more context.
  
  
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Documentation: Review the official SAP documentation for your specific version and database to ensure that all configurations are set up correctly.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult with SAP support for further assistance.