How To Fix FRE502 - Communication failure occured by data transfer for site &1

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 502

• Message text: Communication failure occured by data transfer for site &1

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FRE502 - Communication failure occured by data transfer for site &1 ?

  The SAP error message FRE502 indicates a communication failure during data transfer for a specific site. This error typically occurs in the context of SAP's logistics or supply chain modules, particularly when dealing with data exchange between different systems or sites.
  Cause:
  
  Network Issues: There may be network connectivity problems between the SAP system and the external system or site.
  Configuration Errors: Incorrect configuration settings in the communication parameters (like RFC destinations, logical systems, etc.) can lead to this error.
  System Downtime: The target system or site may be down or undergoing maintenance.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between systems.
  Data Format Issues: The data being transferred may not conform to the expected format, leading to a failure in processing.
  Timeouts: The communication may be timing out due to long processing times or heavy load on the systems.
  
  Solution:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the SAP system and the target site. You can use tools like ping or traceroute to diagnose network issues.
  Review Configuration: Verify the configuration settings for RFC destinations and logical systems in transaction SM59. Ensure that they are correctly set up and that the connection test is successful.
  Check System Status: Confirm that the target system or site is up and running. You can check system logs or contact the system administrator for status updates.
  Firewall Settings: Review firewall settings to ensure that the necessary ports for communication are open and not being blocked.
  Data Validation: Check the data being transferred for any inconsistencies or formatting issues. Ensure that it meets the expected criteria for the receiving system.
  Increase Timeout Settings: If timeouts are suspected, consider increasing the timeout settings in the relevant configuration.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SM21 (System Log), ST22 (Dump Analysis), and SLG1 (Application Log) to gather more information about the error.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to FRE502.
  Documentation: Review the documentation for the specific module you are working with to understand the data transfer processes and requirements.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support or your internal IT team for further investigation.