How To Fix /IWNGW/CM_HUB016 - RFC Error: Communication failure

/IWNGW/CM_HUB016 - Overview

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 016

• Message text: RFC Error: Communication failure

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.

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/IWNGW/CM_HUB016 - Details

• The SAP error message /IWNGW/CM_HUB016 RFC Error: Communication failure typically indicates a problem with the Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. This error can arise due to various reasons, including network issues, configuration problems, or system downtime.
  Causes:
  
  Network Issues: Problems with the network connection, such as firewalls blocking the communication, DNS resolution issues, or network outages.
  RFC Destination Configuration: Incorrect configuration of the RFC destination in the SAP system (e.g., incorrect IP address, port number, or user credentials).
  System Downtime: The target system may be down or not reachable due to maintenance or other issues.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  SAP Gateway Issues: Problems with the SAP Gateway service, which is responsible for handling RFC calls.
  Timeout Settings: The timeout settings for the RFC connection may be too short, causing the connection to fail