How To Fix CN420 - Enter milestone group

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 420

• Message text: Enter milestone group

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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Smart SAP Assistant

• What is the cause and solution for SAP error message CN420 - Enter milestone group ?

  The SAP error message CN420, which states "Enter milestone group," typically occurs in the context of project management and is related to the configuration of milestones in project systems (PS) or related modules. This error indicates that the system requires a milestone group to be specified, but it has not been provided.
  Cause:
  
  Missing Milestone Group: The most common cause of this error is that the milestone group field is left blank when creating or modifying a project or a related object.
  Configuration Issues: There may be issues with the configuration of milestone groups in the system, such as missing entries or incorrect settings.
  Authorization Issues: Sometimes, users may not have the necessary authorizations to access or modify milestone groups.
  
  Solution:
  
  Enter Milestone Group: When prompted with the CN420 error, you should enter a valid milestone group in the relevant field. This can usually be done in the project definition or in the specific transaction where the error occurs.
  Check Configuration: If you are unsure about which milestone group to use, check the configuration settings in the SAP system. You can do this by navigating to the relevant customizing transaction (e.g., SPRO) and reviewing the settings for milestone groups under Project System.
  Review Documentation: Consult the project documentation or guidelines to determine the appropriate milestone group for your project.
  Authorization Check: Ensure that you have the necessary authorizations to access and modify milestone groups. If not, contact your SAP administrator or security team to request the required access.
  Consult with a Functional Consultant: If the issue persists, it may be beneficial to consult with an SAP functional consultant who specializes in Project System to ensure that everything is configured correctly.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), CJ01 (Create Work Breakdown Structure), or CJ02 (Change Work Breakdown Structure) where this error might occur.
  SAP Notes: Check SAP Notes for any known issues or patches related to milestone groups and the CN420 error.
  Documentation: Review SAP Help documentation for Project System to understand how milestone groups are defined and used.
  
  By following these steps, you should be able to resolve the CN420 error and successfully enter the required milestone group in your SAP project.