How To Fix CN623 - Standard network contains & loop(s)

CN623 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 623

• Message text: Standard network contains & loop(s)

Self-Explanatory Message

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CN623 - Details

• The SAP error message CN623, which states "Standard network contains & loop(s)," typically occurs in the context of project management and network planning within SAP. This error indicates that there are circular dependencies or loops in the network structure of a project, which can prevent the system from processing the project correctly.
  
  Cause:
  
  Circular Dependencies: The most common cause of this error is the presence of circular dependencies in the network activities. This means that one or more activities are linked in such a way that they create a loop, making it impossible for the system to determine a valid sequence of execution.
  Incorrect Relationships: Incorrectly defined relationships (predecessors and successors) between activities can lead to loops.
  Multiple Paths: If there are multiple paths that lead back to the same activity, it can create a loop.
  
  
  Solution:
  
  Review Network Activities: Check the network activities for any circular dependencies. You can do this by reviewing the relationships