How To Fix CN166 - Select an activity

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 166

• Message text: Select an activity

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 CN166 - Select an activity ?

  The SAP error message CN166 ("Select an activity") typically occurs in the context of project management or network activities within the SAP system, particularly in the Project System (PS) module. This error indicates that the user has not selected any activity when trying to perform an operation that requires an activity to be selected.
  Cause:
  
  No Activity Selected: The most common cause of this error is that the user has not selected any activity in the project or network before attempting to execute a function that requires an activity to be specified.
  Incorrect Navigation: The user may have navigated to a screen or function that expects an activity to be selected but did not do so.
  User Authorization: In some cases, the user may not have the necessary authorizations to view or select activities.
  
  Solution:
  
  Select an Activity: Ensure that you select an activity from the list before proceeding with the operation. This can usually be done by clicking on the desired activity in the project or network overview.
  Check Navigation: Make sure you are in the correct screen or transaction where activities can be selected. If you are unsure, navigate back to the project or network overview and select the appropriate activity.
  Review Authorizations: If you believe you should be able to select activities but cannot, check with your SAP administrator to ensure you have the necessary authorizations to access and select activities in the Project System.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), CN41 (Network Overview), or CJ03 (Display Work Breakdown Structure) where you can manage activities.
  SAP Documentation: Refer to SAP Help documentation for detailed information on managing project activities and understanding the Project System module.
  User Training: If you are new to SAP or the Project System module, consider undergoing training to better understand how to navigate and perform tasks within the system.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team for further assistance.