How To Fix CN042 - Enter a network number

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 042

• Message text: Enter a network number

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 CN042 - Enter a network number ?

  The SAP error message CN042 ("Enter a network number") typically occurs in the context of project management or network planning within the SAP system, particularly when working with the Project System (PS) module. This error indicates that the system expects a network number to be entered, but it has not been provided.
  Cause:
  
  Missing Network Number: The most common cause of this error is that the user has not entered a network number in the relevant field when trying to create or modify a project or network.
  Incorrect Transaction: The user may be in a transaction that requires a network number but is not providing it.
  Data Entry Error: There may be a typographical error or oversight in entering the network number.
  
  Solution:
  
  Enter a Network Number: Ensure that you enter a valid network number in the appropriate field. This is usually required when creating or modifying a project or network.
  Check Transaction Context: Make sure you are in the correct transaction that requires a network number. If you are unsure, refer to the documentation or help resources for the specific transaction.
  Validate Network Existence: If you believe you have entered a network number, verify that it exists in the system. You can do this by using transaction codes like CN21 (Create Network) or CN22 (Change Network) to check if the network number is valid.
  Consult Documentation: If you are unsure about the required fields or the process, consult the SAP documentation or help resources for guidance on the specific transaction you are working with.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in the Project System module, such as:
  
  CN21 - Create Network
  CN22 - Change Network
  CN23 - Display Network
  
  
  User Roles and Authorizations: Ensure that you have the necessary permissions to create or modify networks in the SAP system.
  SAP Notes and Support: If the issue persists, consider checking SAP Notes or reaching out to your SAP support team for further assistance.
  
  By following these steps, you should be able to resolve the CN042 error and proceed with your project management tasks in SAP.