How To Fix CN420 - Enter milestone group

CN420 - Overview

• 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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CN420 - Details

• 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