How To Fix 3G404 - Communication error with system &1, function &2

SAP Error Message - Details

• Message type: E = Error

• Message class: 3G - Payroll: International

• Message number: 404

• Message text: Communication error with system &1, function &2

What causes this issue?

The function module "&V2&" has been called remotely in system "&V1&".
As a result, an error occurred when creating the connection or during
communication.

How to fix this error?

Check that the ALE distribution model is correctly maintained.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 3G404 - Communication error with system &1, function &2 ?

  The SAP error message 3G404, which indicates a "Communication error with system &1, function &2," typically arises when there is a problem with the communication between the SAP system and another system or service. This could be due to various reasons, including network issues, configuration problems, or issues with the external system itself.
  Causes:
  
  Network Issues: There may be a network connectivity problem between the SAP system and the external system.
  Configuration Errors: Incorrect configuration settings in the SAP system or the external system can lead to communication failures.
  Timeouts: The request may be timing out due to slow response times from the external system.
  Service Availability: The external system or service may be down or unavailable.
  Firewall or Security Settings: Firewalls or security settings may be blocking the communication.
  Incorrect Credentials: If authentication is required, incorrect credentials can lead to communication errors.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the SAP system and the external system is stable and functioning properly. You can use tools like ping or traceroute to diagnose network issues.
  Review Configuration Settings: Verify the configuration settings in both the SAP system and the external system. Ensure that the connection parameters (like host, port, etc.) are correct.
  Increase Timeout Settings: If the issue is related to timeouts, consider increasing the timeout settings in the SAP system or the external system.
  Check External System Status: Ensure that the external system or service is up and running. You may need to contact the administrator of the external system for assistance.
  Review Firewall Settings: Check the firewall settings to ensure that they are not blocking the communication between the systems.
  Validate Credentials: If applicable, verify that the credentials used for authentication are correct and have the necessary permissions.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  Transaction Codes: Use transaction codes like SM21 (System Log) or ST22 (Dump Analysis) to check for any related logs or dumps that may provide more context about the error.
  Monitoring Tools: Utilize SAP monitoring tools to track the performance and status of the communication between systems.
  
  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.