How To Fix B1606 - Connection terminated (TXCOM destination &); see R/2 or SAP system log

SAP Error Message - Details

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 606

• Message text: Connection terminated (TXCOM destination &); see R/2 or SAP system log

What causes this issue?

The connection to R/2 with the TXCOM destination &v1& was suddenly
broken off.

How to fix this error?

Check that the R/2 system, the connection to R/2 and the
gateway are all available.
The sending of this IDoc will be restarted automatically as long as the
maximum repeat count is not exceeded.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message B1606 - Connection terminated (TXCOM destination &); see R/2 or SAP system log ?

  The SAP error message B1606, which indicates that a connection has been terminated for a specified TXCOM destination, typically arises in the context of communication between SAP systems or between an SAP system and an external system. This error can occur due to various reasons, including network issues, configuration problems, or system resource limitations.
  Causes:
  
  Network Issues: Temporary network outages or instability can lead to connection terminations.
  Configuration Errors: Incorrect settings in the RFC (Remote Function Call) destination or in the communication parameters can cause this error.
  System Resource Limitations: If the SAP system is under heavy load or if there are insufficient resources (like memory or CPU), it may terminate connections.
  Timeout Settings: If the communication takes longer than expected, it may exceed timeout settings, leading to termination.
  Firewall or Security Settings: Firewalls or security settings may block the connection, causing it to be terminated.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the systems is stable and functioning properly. You can use tools like ping or traceroute to diagnose network issues.
  Review RFC Destination Configuration: Go to transaction SM59 and check the configuration of the RFC destination. Ensure that all parameters are correctly set, including the target host, system number, and client.
  Monitor System Resources: Use transaction SM50 or SM66 to monitor system performance and check for any resource bottlenecks. If the system is overloaded, consider optimizing performance or increasing resources.
  Adjust Timeout Settings: If applicable, review and adjust the timeout settings in the RFC destination configuration to allow for longer processing times.
  Check System Logs: Use transaction SM21 to check the system log for any related messages that might provide more context about the error.
  Firewall and Security Settings: Ensure that any firewalls or security settings are configured to allow the necessary traffic between the systems.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  SM21: To view system logs.
  SM50 / SM66: To monitor active processes and system performance.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to RFC communication and troubleshooting connectivity issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.