How To Fix CN123 - Specified assignment to network does not exist

CN123 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 123

• Message text: Specified assignment to network does not exist

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN123 - Specified assignment to network does not exist ?

  The SAP error message CN123 ("Specified assignment to network does not exist") typically occurs in the context of project management and network planning within SAP. This error indicates that the system cannot find the specified assignment of a network activity to a project or a work breakdown structure (WBS) element.
  Causes:
  
  Incorrect Network Assignment: The network activity you are trying to reference may not be correctly assigned to the project or WBS element.
  Deleted or Inactive Network: The network or activity you are trying to access may have been deleted or is currently inactive.
  Data Inconsistency: There may be inconsistencies in the data, such as missing or incorrect entries in the database.
  Authorization Issues: The user may not have the necessary authorizations to view or modify the network assignment.
  Incorrect Configuration: There may be configuration issues in the project system settings that prevent the assignment from being recognized.
  
  Solutions:
  
  
  Verify Network Assignment:
  
  Check the network and activity assignments in