How To Fix SY310 - Error during connection setup (CMALLP), return code = &

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 310

• Message text: Error during connection setup (CMALLP), return code = &

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 SY310 - Error during connection setup (CMALLP), return code = & ?

  The SAP error message SY310 indicates that there was an issue during the connection setup, specifically with the connection type CMALLP (which is typically related to the communication between SAP systems or between an SAP system and an external system). The return code provided in the error message can give more specific information about the nature of the issue.
  Possible Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Configuration Errors: Incorrect configuration settings in the SAP system or the target system can lead to connection failures.
  Authorization Issues: The user or service account being used to establish the connection may not have the necessary permissions.
  Service Availability: The target service may not be running or may be unreachable.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection.
  Incorrect Parameters: The parameters used for the connection (like host, port, etc.) may be incorrect.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the systems is stable and that there are no issues with firewalls or routing.
  Review Configuration Settings: Verify the configuration settings in both the SAP system and the target system. Ensure that all parameters (like hostnames, ports, etc.) are correct.
  Check User Authorizations: Ensure that the user or service account has the necessary authorizations to establish the connection.
  Service Status: Check if the target service is up and running. If it’s a web service, you can try accessing it directly via a browser or a tool like Postman.
  Firewall and Security Settings: Review firewall rules and security settings to ensure that they allow traffic on the required ports.
  Review Logs: Check the SAP system logs (transaction SM21) and the application logs (transaction SLG1) for more detailed error messages that can provide additional context.
  
  Related Information:
  
  
  Return Code: The return code in the error message can provide specific insights into the nature of the error. Common return codes include:
  
  0: Success
  1: General error
  2: Connection refused
  3: Timeout
  (Refer to SAP documentation for a complete list of return codes and their meanings.)
  
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Transaction Codes: Use transaction codes like SM59 (for RFC destinations) to check and test the connection settings.
  
  
  If the issue persists after following these steps, it may be beneficial to engage SAP support for further assistance, providing them with detailed logs and the specific return code for more targeted help.