How To Fix CN601 - No loop in the network

CN601 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 601

• Message text: No loop in the network

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN601 - No loop in the network ?

  The SAP error message CN601 "No loop in the network" typically occurs in the context of project management and network planning within the SAP system, particularly when dealing with network activities in Project System (PS) or Production Planning (PP). This error indicates that the system has detected a situation where a network activity is not properly linked, leading to a lack of a valid loop or sequence in the network structure.
  
  Cause:
  
  Incorrect Network Structure: The network may not have been set up correctly, leading to missing dependencies or relationships between activities.
  Missing Relationships: There may be missing predecessor or successor relationships between activities, which are necessary for the network to function correctly.
  Improper Activity Configuration: Activities may not be configured properly, leading to inconsistencies in the network.
  Circular Dependencies: The system may detect a circular dependency that prevents it from establishing a valid sequence of activities.
  
  
  Solution:
  
  Check Network Structure: Review the network structure to ensure