How To Fix BGRFC355 - Server &1: Number of possible connections &2 is incorrect

SAP Error Message - Details

• Message type: E = Error

• Message class: BGRFC - qRFC - New Background RFC

• Message number: 355

• Message text: Server &1: Number of possible connections &2 is incorrect

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

If you want to lock the server for background RFC calls, enter a
positive value or 0.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BGRFC355 - Server &1: Number of possible connections &2 is incorrect ?

  The SAP error message BGRFC355 indicates an issue with the configuration of the background RFC (BGRFC) server. Specifically, it suggests that the number of possible connections configured for the BGRFC server is incorrect. This can occur due to various reasons, such as misconfiguration or changes in the system landscape.
  Cause:
  
  Configuration Mismatch: The number of connections defined in the BGRFC server configuration does not match the expected value. This could be due to manual changes or incorrect settings during system setup.
  System Changes: Changes in the system landscape, such as adding or removing application servers, can lead to discrepancies in the connection settings.
  Resource Limitations: The server may not have enough resources (like memory or processing power) to handle the configured number of connections.
  
  Solution:
  
  
  Check BGRFC Configuration:
  
  Go to transaction SM59 and check the configuration of the BGRFC destination.
  Ensure that the number of connections is set correctly according to your system's requirements.
  
  
  
  Adjust Connection Parameters:
  
  In transaction RZ10, check the profile parameters related to BGRFC, such as rfc/bgrfc/max_connections.
  Adjust the parameters to match the expected number of connections. You may need to increase the limit if your system has grown or if you have added more application servers.
  
  
  
  Restart BGRFC Server:
  
  After making changes, restart the BGRFC server to apply the new settings. You can do this using transaction SM58 or by using the appropriate command in the operating system.
  
  
  
  Monitor System Resources:
  
  Ensure that the server has adequate resources (CPU, memory) to handle the configured number of connections. If necessary, consider scaling up your infrastructure.
  
  
  
  Check Logs:
  
  Review the system logs (transaction SM21) and BGRFC logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the issue.
  
  
  
  Related Information:
  
  BGRFC Overview: Background RFC (BGRFC) is used for asynchronous communication between different SAP systems or between different application servers within the same system.
  SAP Notes: Check SAP Notes related to BGRFC for any known issues or patches that might address this error.
  Documentation: Refer to the official SAP documentation for BGRFC configuration and best practices.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance.