How To Fix CN401 - Maintain fixed date only or reference to activity


CN401 - Overview

  • Message type: E = Error

  • Message class: CN - Meldungen für Netzpläne

  • Message number: 401

  • Message text: Maintain fixed date only or reference to activity

  • Show details Hide details
  • What causes this issue?

    When you enter a date for a milestone, you must note:
    either enter a fixed date
    or enter an offset of the milestone to the activity, for example, an
    offset to the start or the key <LS>Start/fin.</>

    System Response

    INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

    How to fix this error?

    Enter either
    a fixed date
    or an offset to start or finish
    or the key <LS>Start/fin.</>

    Error message extract from SAP system. Copyright SAP SE.


Smart SAP Assistant

  • What is the cause and solution for SAP error message CN401 - Maintain fixed date only or reference to activity ?
    The SAP error message CN401 typically occurs in the context of project management and is related to the scheduling of activities within a project. The message indicates that a fixed date must be maintained for the activity or that a reference to another activity should be established. Here’s a breakdown of the cause, solution, and related information for this error:
    
    Cause: Missing Fixed Date: The activity you are trying to schedule does not have a fixed date assigned to it. In project management, certain activities require a specific start or finish date to ensure proper scheduling and resource allocation. Reference Activity Not Defined: The activity may need to reference another activity that has a defined date. This is often necessary for dependencies between tasks. Project Settings: The project settings may require that all activities have either a fixed date or a reference to another activity, and if neither is provided, the error will be

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