How To Fix CN838 - Several start/target activities exist

CN838 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 838

• Message text: Several start/target activities exist

What causes this issue?

The network which is to become a subnetwork has several start and/or
finish (target) activities.
In this situation, the system creates relationships to all start and/or
finish (target) activities.

System Response

INCLUDE 'NA_ALLG_FUNKTION' OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.

CN838 - Details

• The SAP error message CN838 ("Several start/target activities exist") typically occurs in the context of project management within SAP, particularly when dealing with network activities in Project System (PS). This error indicates that there are multiple activities that are defined as either start or target activities for a given network, which can lead to ambiguity in scheduling and planning.
  
  Cause:
  
  Multiple Start Activities: The network may have more than one activity defined as a start activity, which confuses the system about which activity should be the actual starting point.
  Multiple Target Activities: Similarly, if there are multiple target activities defined, the system cannot determine which one should be the endpoint of the network.
  Incorrect Network Configuration: The network structure may not be configured correctly, leading to overlapping or conflicting definitions of activities.
  
  
  Solution:
  
  Review Network Activities: Go to the network in question and review the activities defined. Ensure that there is only one start activity and