How To Fix SY309 - Error in connection setup (CMALLC), return code = &

SY309 - Overview

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 309

• Message text: Error in connection setup (CMALLC), 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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SY309 - Error in connection setup (CMALLC), return code = & ?

  The SAP error message SY309 indicates that there is an issue with the connection setup for the CMALLC (Central Management and Administration Layer Connection) component. The return code provided in the error message can give more specific information about the nature of the problem.
  Possible Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the database or application server.
  Configuration Errors: Incorrect configuration settings in the SAP system or in the database connection parameters.
  Authorization Issues: The user or service account may not have the necessary permissions to establish the connection.
  Service Availability: The service that the connection is trying to reach may be down or not running.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Ensure that the network connection between the SAP system and the target server is stable and operational.
  Use tools like ping or traceroute to diagnose network issues.
  
  
  
  Review Configuration Settings:
  
  Verify the connection parameters