How To Fix GW230 - No free connections exist; log on again later

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 230

• Message text: No free connections exist; log on again later

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 GW230 - No free connections exist; log on again later ?

  The SAP error message GW230: No free connections exist; log on again later typically indicates that the SAP Gateway is unable to establish a new connection because it has reached its maximum limit of concurrent connections. This can happen for several reasons, including:
  Causes:
  
  Max Connections Reached: The number of allowed connections to the SAP system has been exceeded. This can occur during peak usage times or if there are many users logged in simultaneously.
  Idle Connections: Connections that are not properly closed or are left idle for too long may still count against the maximum limit.
  Configuration Issues: The SAP Gateway configuration may not be set up to handle the expected number of connections.
  Resource Limitations: The underlying hardware or network resources may be insufficient to support the number of connections being requested.
  
  Solutions:
  
  
  Increase Connection Limits:
  
  You can increase the maximum number of connections allowed in the SAP Gateway configuration. This can be done by adjusting the parameters in the instance profile (e.g., rdisp/max_con).
  Use transaction RZ10 to modify the instance profile and increase the value of rdisp/max_con.
  
  
  
  Monitor and Manage Connections:
  
  Use transaction SM04 to monitor active user sessions and identify any idle or unnecessary connections that can be terminated.
  Regularly check for and close any sessions that are no longer in use.
  
  
  
  Check for System Performance:
  
  Ensure that the system has adequate resources (CPU, memory, etc.) to handle the expected load.
  Review system logs for any performance-related issues that may be affecting connection availability.
  
  
  
  Restart the SAP Gateway:
  
  If the issue persists, consider restarting the SAP Gateway to clear any stuck connections. This can be done through transaction SMGW.
  
  
  
  Review Network Configuration:
  
  Ensure that network settings and firewalls are not limiting the number of connections to the SAP system.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this issue or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM04: User Overview - to monitor active sessions.
  SMGW: Gateway Monitor - to check the status of the SAP Gateway.
  RZ10: Profile Maintenance - to change instance profile parameters.
  
  
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on configuring the SAP Gateway and managing connections.
  
  
  Performance Monitoring Tools: Consider using SAP Solution Manager or other performance monitoring tools to keep track of system performance and connection usage.
  
  
  By following these steps, you should be able to resolve the GW230 error and improve the management of connections in your SAP environment.