How To Fix CN222 - A time unit is required for the duration of the relationship

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 222

• Message text: A time unit is required for the duration of the relationship

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 CN222 - A time unit is required for the duration of the relationship ?

  The SAP error message CN222 ("A time unit is required for the duration of the relationship") typically occurs in the context of project management or network planning within SAP, particularly when dealing with relationships between activities in a project.
  Cause:
  This error usually arises when you are trying to create or modify a relationship between activities (or tasks) in a project, but the system cannot find a valid time unit for the duration of that relationship. This can happen due to several reasons:
  
  Missing Duration: The duration for the relationship is not specified or is set to zero.
  Incorrect Time Unit: The time unit for the duration is not defined or is not recognized by the system.
  Configuration Issues: There may be issues with the configuration of the project management module in SAP, particularly related to time units.
  
  Solution:
  To resolve the CN222 error, you can take the following steps:
  
  
  Check Duration: Ensure that the duration for the relationship is specified and is greater than zero. You can do this by navigating to the relevant activity or task and checking its duration settings.
  
  
  Specify Time Unit: Make sure that a valid time unit (such as days, hours, etc.) is assigned to the duration. You can usually find this in the settings or attributes of the activity.
  
  
  Review Project Settings: Check the project settings to ensure that the time units are correctly configured. This may involve looking at the project profile or the configuration settings in the project management module.
  
  
  Use Valid Relationships: Ensure that the type of relationship you are trying to create (e.g., Finish-to-Start, Start-to-Start) is appropriate and that the activities involved are correctly defined.
  
  
  Consult Documentation: If you are unsure about the correct settings, refer to the SAP documentation or help resources for guidance on setting up project relationships.
  
  
  Check User Authorizations: Ensure that you have the necessary authorizations to make changes to the project or activity settings.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CJ20N (Project Builder) or CN22 (Change Network) to access and modify project activities and their relationships.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Training and Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  By following these steps, you should be able to resolve the CN222 error and successfully manage the relationships between activities in your SAP project.