How To Fix CN458 - Scheduling with more than two levels is not supported

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 458

• Message text: Scheduling with more than two levels is not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN458 - Scheduling with more than two levels is not supported ?

  The SAP error message CN458, which states "Scheduling with more than two levels is not supported," typically occurs in the context of project management and network scheduling within SAP. This error indicates that the system has encountered a situation where a scheduling operation involves more than two levels of hierarchy, which is not supported by the standard SAP scheduling functionality.
  Cause:
  
  Hierarchical Structure: The error usually arises when you have a complex project structure with multiple levels of tasks or activities that exceed the two-level hierarchy (e.g., main task and sub-task).
  Network Planning: In network planning, if you are trying to schedule activities that are linked in a way that creates more than two levels of dependencies, the system will throw this error.
  Configuration Issues: There may be configuration settings in the project management module that do not allow for more than two levels of scheduling.
  
  Solution:
  
  Simplify the Structure: Review the project structure and try to simplify it. Ensure that you are not creating unnecessary levels of hierarchy. If possible, flatten the structure to fit within the two-level limitation.
  Restructure Activities: If you have activities that are too deeply nested, consider restructuring them to fit within the two-level hierarchy. This may involve breaking down complex tasks into simpler ones or combining tasks.
  Use Alternative Scheduling Methods: If your project requires more complex scheduling, consider using alternative methods or tools that can handle multi-level scheduling, or explore if there are any enhancements or add-ons available for your SAP system that can support this.
  Check Configuration: Review the configuration settings in your SAP system related to project management and scheduling. Ensure that they are set up correctly and that there are no restrictions that could be causing this error.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on project scheduling and any limitations that may apply.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. SAP frequently updates its software, and there may be fixes or workarounds available.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered this issue and what solutions they have found.
  Training and Documentation: Ensure that users involved in project management are trained on the limitations of the SAP scheduling functionality and best practices for structuring projects.
  
  By addressing the hierarchical structure and ensuring compliance with SAP's scheduling capabilities, you should be able to resolve the CN458 error.