How To Fix B1604 - No connection to SAP gateway (TXCOM destination &); see SAP system log

B1604 - Overview

• Message type: E = Error

• Message class: B1 - ALE group messages

• Message number: 604

• Message text: No connection to SAP gateway (TXCOM destination &); see SAP system log

What causes this issue?

No connection could be made to the SAP gateway with TXCOM destination
&v1&.

How to fix this error?

Check the gateway and supply the TXCOM with the correct values where
necessary.
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.

B1604 - Details

• The SAP error message B1604 indicates that there is no connection to the SAP gateway for a specified transaction communication (TXCOM) destination. This can occur for various reasons, and resolving it typically involves checking the configuration and connectivity of the SAP system. Here’s a breakdown of the potential causes, solutions, and related information:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP application server and the SAP gateway.
  Gateway Configuration: The SAP gateway may not be properly configured or may not be running.
  Transaction Destination Issues: The specified TXCOM destination may not be correctly set up in the SAP system.
  Authorization Issues: The user may not have the necessary authorizations to access the gateway.
  System Load: High system load or resource constraints may prevent the gateway from processing requests.
  Firewall Settings: Firewalls or security settings may be blocking the connection to the SAP gateway.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that