How To Fix CN448 - Select only one entry

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 448

• Message text: Select only one entry

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 CN448 - Select only one entry ?

  The SAP error message CN448 ("Select only one entry") typically occurs in the context of project management or network activities within the SAP system, particularly when working with transactions related to project structures, such as the Project System (PS) module.
  Cause:
  This error message is triggered when a user attempts to perform an action that requires a single selection, but multiple entries are selected instead. This can happen in various scenarios, such as:
  
  Trying to execute a function that is designed to work with a single project or activity but multiple projects or activities are highlighted.
  Attempting to display or edit details for a specific project or network when the system detects more than one selection.
  
  Solution:
  To resolve the CN448 error, follow these steps:
  
  
  Check Your Selection: Ensure that you have only one entry selected in the list or table. If you have multiple entries highlighted, deselect all but one.
  
  
  Use Filters: If you are working with a large dataset, consider applying filters to narrow down your selection to a single entry.
  
  
  Review Transaction Steps: If you are following a specific transaction or process, double-check the steps to ensure that you are at the correct point where a single entry is required.
  
  
  Refresh the Screen: Sometimes, the interface may not update correctly. Refresh the screen or re-enter the transaction to ensure that the selections are correctly recognized.
  
  
  Consult Documentation: If you are unsure about the process, refer to the SAP documentation or help resources related to the specific transaction you are using.
  
  
  Seek Help from IT Support: If the issue persists and you are unable to resolve it, consider reaching out to your SAP support team or IT department for assistance.
  
  
  Related Information:
  
  Transaction Codes: The error may occur in various transaction codes related to project management, such as CJ20N (Project Builder), CN41 (Project Overview), or others.
  User Permissions: Ensure that you have the necessary permissions to perform the action you are attempting, as restrictions may also lead to unexpected behavior.
  SAP Notes: Check for any relevant SAP Notes or updates that may address known issues related to this error message.
  
  By following these guidelines, you should be able to resolve the CN448 error and continue with your work in SAP.