How To Fix CN801 - Activity "&" does not exist in network "&"

CN801 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 801

• Message text: Activity "&" does not exist in network "&"

What causes this issue?

You have maintained a relationship for an activity that does not exist
in this network.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

INCLUDE 'NA_ALLG_URSACHEN' OBJECT DOKU ID TX
RESET N1
Check that you have entered the correct key for the activity.
Make sure that the activity, whose key you have entered, really does
exist.
Enter another key for the activity.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN801 - Activity "&" does not exist in network "&" ?

  The SAP error message CN801 indicates that the system is unable to find a specific activity in a network. This typically occurs in the context of project management and network planning within SAP, particularly in modules like SAP PS (Project System).
  
  Cause:
  The error message CN801 can be triggered by several factors:
  
  Non-existent Activity: The activity specified in the error message does not exist in the network. This could be due to a typo in the activity number or the activity being deleted or not created yet.
  Network Not Active: The network itself may not be active or may have been deleted.
  Authorization Issues: The user may not have the necessary authorizations to view or access the specified activity or network.
  Data Inconsistency: There may be inconsistencies in the data, such as missing entries in the database.
  
  
  Solution:
  To resolve the CN801 error, you can take the following steps:
  
  
  Verify Activity and Network:
  
  Check if the activity number and network