How To Fix CN587 - You can only use an activity as a filter together with a network

CN587 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 587

• Message text: You can only use an activity as a filter together with a network

What causes this issue?

You can only use an activity as a filter, if you also enter the
network.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

Enter the corresponding network number.

Error message extract from SAP system. Copyright SAP SE.

CN587 - Details

• The SAP error message CN587 indicates that you are trying to use an activity as a filter in a context where it is not applicable, specifically when working with a network. This error typically arises in the context of project management or network planning within SAP, particularly in the Project System (PS) module.
  
  Cause:
  The error occurs because:
  
  You are attempting to filter or manipulate data using an activity (which is a task or work package) in a scenario that requires a network (which is a collection of activities and their relationships).
  The system expects a network structure to be in place when dealing with activities, as activities are usually part of a network in project planning.
  
  
  Solution:
  To resolve this error, consider the following steps:
  
  
  Check Context: Ensure that you are in the correct context where a network is required. If you are trying to filter activities, make sure you are doing so within a network