How To Fix /IWNGW/CM_HUB075 - RFC callback performed to resolve metadata or data (system alias '&1')

/IWNGW/CM_HUB075 - Overview

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 075

• Message text: RFC callback performed to resolve metadata or data (system alias '&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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

/IWNGW/CM_HUB075 - Details

• The SAP error message /IWNGW/CM_HUB075 typically indicates an issue related to the RFC (Remote Function Call) callback mechanism used in the context of SAP Gateway services. This error message suggests that there was a problem resolving metadata or data for a specific system alias.
  
  Cause:
  
  
  System Alias Configuration: The system alias specified in the error message (&1) may not be correctly configured in the SAP Gateway system. This could be due to missing or incorrect entries in the configuration.
  
  
  Network Issues: There may be network connectivity issues between the SAP Gateway and the backend system that the system alias points to.
  
  
  Authorization Issues: The user or service account being used to perform the RFC call may not have the necessary authorizations to access the backend system.
  
  
  Backend System Issues: The backend system may be down, or there may be issues with the services or data being requested.
  
  
  Metadata Issues: The metadata for the service may not