How To Fix FRE169 - RFC-Error: Comm/Syst Failure- Sequential Processing

SAP Error Message - Details

• Message type: E = Error

• Message class: FRE - F&R CON R/3 - Messages

• Message number: 169

• Message text: RFC-Error: Comm/Syst Failure- Sequential Processing

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 FRE169 - RFC-Error: Comm/Syst Failure- Sequential Processing ?

  The SAP error message FRE169, which indicates an RFC (Remote Function Call) error due to a communication/system failure during sequential processing, can arise from various issues. Here’s a breakdown of potential causes, solutions, and related information:
  Causes:
  
  Network Issues: Problems with the network connection between the SAP systems can lead to communication failures.
  System Configuration: Incorrect configuration of the RFC destination or the SAP system settings can cause this error.
  Resource Limitations: Insufficient system resources (like memory or CPU) on the application server can lead to failures in processing requests.
  Lock Issues: If a resource is locked by another process, it may cause a sequential processing error.
  Transport Layer Issues: Problems in the transport layer, such as issues with the SAP kernel or middleware, can also lead to this error.
  Timeouts: Long-running processes may exceed the timeout settings, leading to a failure in communication.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there are no network issues between the systems involved. Use tools like ping or traceroute to diagnose connectivity.
  Review RFC Destination: Verify the configuration of the RFC destination in transaction SM59. Ensure that the connection parameters are correct and that the destination is reachable.
  Monitor System Resources: Use transaction SM50 or SM66 to monitor the workload on the application servers. Check for any resource bottlenecks.
  Check for Locks: Use transaction SM12 to check for any locks that might be causing the issue. If necessary, release locks that are no longer needed.
  Review System Logs: Check the system logs (transaction SM21) for any related error messages that could provide more context about the failure.
  Adjust Timeout Settings: If timeouts are an issue, consider adjusting the timeout settings in the RFC destination configuration.
  Update SAP Kernel: Ensure that the SAP kernel and other components are up to date, as bugs in older versions can lead to communication issues.
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to FRE169. You can search the SAP Support Portal for notes related to RFC errors.
  Transaction Codes: Familiarize yourself with transaction codes like SM59 (RFC destinations), SM21 (system log), SM50 (process overview), and SM12 (lock entries) for troubleshooting.
  Documentation: Review SAP documentation for best practices on configuring RFC connections and handling communication errors.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage SAP support for further assistance, providing them with detailed logs and error messages for a more in-depth analysis.