How To Fix CN900 - Service lines for service activity & & cannot be empty

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 900

• Message text: Service lines for service activity & & cannot be empty

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN900 - Service lines for service activity & & cannot be empty ?

  The SAP error message "CN900 Service lines for service activity & & cannot be empty" typically occurs in the context of project management or service management within SAP, particularly when dealing with service activities in a project or service order. This error indicates that the system expects service lines (details about the services to be performed) to be filled in for a specific service activity, but they are currently empty.
  Cause:
  
  Missing Service Lines: The most common cause of this error is that the service activity has not been assigned any service lines. Service lines are necessary to define what services are to be performed, their quantities, and other relevant details.
  Incorrect Configuration: There may be configuration issues in the project or service management settings that prevent the proper assignment of service lines.
  Data Entry Error: Users may have inadvertently skipped entering service lines when creating or modifying the service activity.
  
  Solution:
  
  
  Add Service Lines: 
  
  Navigate to the service activity in question.
  Ensure that you enter the required service lines. This typically involves specifying the service type, quantity, and any other relevant details.
  
  
  
  Check Configuration: 
  
  Review the configuration settings for service activities in your SAP system. Ensure that the necessary settings are in place to allow for the assignment of service lines.
  Consult with your SAP administrator or functional consultant if you suspect configuration issues.
  
  
  
  Review User Input: 
  
  If the error occurs during data entry, double-check the input fields to ensure that all required information is filled out correctly.
  Ensure that the user has the necessary permissions to create or modify service lines.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or help resources for specific guidance on service activities and service lines. This can provide insights into required fields and configurations.
  
  
  
  Error Logs: 
  
  Check the system logs for any additional error messages or warnings that may provide more context about the issue.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder) or IW31/IW32 (Service Order Management) where service activities are managed.
  SAP Notes: Search for SAP Notes related to this error message in the SAP Support Portal, as there may be specific patches or updates that address known issues.
  User Training: Ensure that users involved in project management or service management are adequately trained on the importance of service lines and how to enter them correctly.
  
  By following these steps, you should be able to resolve the CN900 error and ensure that service lines are properly assigned to service activities in your SAP system.