How To Fix CN813 - Enter activity number

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 813

• Message text: Enter activity 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.

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN813 - Enter activity number ?

  The SAP error message CN813 "Enter activity number" typically occurs in the context of project management or controlling modules, particularly when working with network activities in SAP Project System (PS) or related areas. This error indicates that the system expects an activity number to be entered, but it has not been provided.
  Cause:
  
  Missing Activity Number: The most common cause is that the user has not entered an activity number in the relevant field where it is required.
  Incorrect Screen Navigation: The user may have navigated to a screen that requires an activity number without having selected or created one.
  Data Entry Error: The user may have inadvertently deleted or not filled in the required field.
  
  Solution:
  
  Enter Activity Number: The most straightforward solution is to enter a valid activity number in the field where the error is being triggered.
  Check Project Structure: Ensure that the project structure is correctly set up and that the activity you are trying to reference exists.
  Create Activity: If the activity does not exist, you may need to create it first before referencing it.
  Review User Permissions: Ensure that you have the necessary permissions to view or create activities in the project.
  Consult Documentation: If you are unsure about the correct activity number or how to create one, refer to your organization's SAP documentation or user manuals.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) or CN21 (Create Network) where you might encounter this error.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Training: If this error occurs frequently, consider additional training for users on how to navigate the project management module effectively.
  System Configuration: In some cases, the error may be related to system configuration. Consult with your SAP Basis or configuration team if the issue persists.
  
  If the problem continues after trying these solutions, it may be beneficial to reach out to your SAP support team for further assistance.