How To Fix B1601 - RFC destination & for port & is not available

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 601

• Message text: RFC destination & for port & is not available

What causes this issue?

The port &v2& refers to the destination &v1& for the Remote Function
Call (RFC). This destination does not exist.

How to fix this error?

Either specify the missing destination using transaction SM59 or change
the destination in the port description.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message B1601 - RFC destination & for port & is not available ?

  The SAP error message B1601 indicates that there is an issue with the RFC (Remote Function Call) destination configuration. Specifically, the message states that the RFC destination is not available for the specified port. This can occur for several reasons, and here are some common causes, solutions, and related information:
  Causes:
  
  Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system.
  Network Issues: There may be network connectivity issues between the SAP system and the target system.
  Target System Down: The target system that the RFC destination points to may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the required ports for RFC communication.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured.
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction code SM59 in the SAP GUI.
  Locate the RFC destination that is causing the issue and check its configuration.
  Ensure that the target host, service, and other parameters are correctly set.
  
  
  
  Test the Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to verify if the connection can be established.
  
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the target system is reachable from the SAP server.
  Ensure that the correct ports are open and accessible.
  
  
  
  Review Firewall Settings:
  
  Check the firewall settings on both the SAP server and the target system to ensure that the necessary ports for RFC communication are open.
  
  
  
  Check Target System Status:
  
  Verify that the target system is up and running. If it is down, you will need to bring it back online.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running on the SAP system. You can check this using transaction SMGW.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer trace files (transaction ST22) for any additional error messages that may provide more context.
  
  
  
  Related Information:
  
  RFC Destinations: RFC destinations are used in SAP to define the connection parameters for remote systems. They can be configured as either "ABAP Connections" or "TCP/IP Connections."
  Transaction Codes:
  
  SM59: Manage RFC destinations.
  SMGW: Monitor the SAP Gateway.
  SM21: View system logs.
  ST22: Analyze dump analysis.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to RFC connectivity.
  
  By following these steps, you should be able to diagnose and resolve the B1601 error in your SAP system.