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

3G404 - Overview

• 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.

3G404 - Details

• 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