How To Fix CN827 - You cannot enter a new external network in change mode

CN827 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 827

• Message text: You cannot enter a new external network in change mode

What causes this issue?

You entered a network in change mode, that does not exist.

System Response

Processing ended.

How to fix this error?

Switch to add mode and enter the relationships to the external network
that you want.

Error message extract from SAP system. Copyright SAP SE.

CN827 - Details

• The SAP error message CN827 ("You cannot enter a new external network in change mode") typically occurs in the context of project management or network planning within the SAP system, particularly when dealing with external networks in the Project System (PS) module.
  
  Cause:
  This error arises when a user attempts to create or modify an external network while in change mode. In SAP, external networks are typically predefined and cannot be altered or added to in change mode. The system restricts this action to maintain data integrity and consistency.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check the Mode: Ensure that you are in the correct mode for the action you want to perform. If you need to create a new external network, you should be in the "create" mode rather than "change" mode.
  
  
  Use the Correct Transaction: If you are trying to create a new external network, make sure you are using