How To Fix DLALR400 - No link confirmation from R/2

SAP Error Message - Details

• Message type: E = Error

• Message class: DLALR - Data link to central systems

• Message number: 400

• Message text: No link confirmation from R/2

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DLALR400 - No link confirmation from R/2 ?

  The SAP error message DLALR400 No link confirmation from R/2 typically occurs in the context of communication between SAP R/3 and SAP R/2 systems. This error indicates that the R/3 system did not receive a confirmation from the R/2 system for a link or connection that was expected.
  Causes:
  
  Network Issues: There may be network connectivity problems between the R/3 and R/2 systems, preventing the confirmation message from being sent or received.
  Configuration Errors: Incorrect configuration settings in either the R/3 or R/2 system can lead to communication failures.
  System Downtime: The R/2 system may be down or not responding, which would prevent it from sending the necessary confirmation.
  Protocol Mismatch: There may be a mismatch in the communication protocols or settings between the two systems.
  Timeouts: The connection may be timing out due to long processing times or delays in the R/2 system.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the R/3 and R/2 systems. You can use tools like ping or traceroute to diagnose connectivity.
  Review Configuration Settings: Verify the configuration settings in both the R/3 and R/2 systems. Ensure that the communication parameters are correctly set up.
  Check System Status: Confirm that the R/2 system is up and running. If it is down, you will need to restart it or resolve any issues causing the downtime.
  Increase Timeout Settings: If timeouts are suspected, consider increasing the timeout settings in the communication configuration.
  Review Logs: Check the system logs in both R/3 and R/2 for any additional error messages or warnings that could provide more context about the issue.
  Consult Documentation: Refer to SAP documentation or support notes related to the specific versions of R/3 and R/2 you are using for any known issues or patches.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Technical Support: If the issue persists, consider reaching out to SAP technical support for assistance, providing them with detailed logs and error messages for better diagnosis.
  
  By following these steps, you should be able to identify and resolve the cause of the DLALR400 error message.