How To Fix CY420 - Phases cannot be dispatched or deallocated

SAP Error Message - Details

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 420

• Message text: Phases cannot be dispatched or deallocated

What causes this issue?

Currently you cannot dispatch phases directly.

How to fix this error?

If you want to dispatch or deallocate phases, dispatch or deallocate
the operation. The phases that belong to it are thereby also dealt with.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CY420 - Phases cannot be dispatched or deallocated ?

  The SAP error message CY420: Phases cannot be dispatched or deallocated typically occurs in the context of production planning and control, particularly when dealing with capacity planning and scheduling in SAP. This error indicates that there are issues with the phases of a production order or a process order that prevent them from being dispatched or deallocated.
  Causes:
  
  
  Incorrect Status of the Order: The production order or process order may not be in a status that allows for dispatching or deallocation. For example, if the order is already completed or technically closed, you cannot dispatch or deallocate phases.
  
  
  Capacity Constraints: There may be capacity constraints that prevent the phases from being dispatched. This could be due to resource availability or scheduling conflicts.
  
  
  Missing or Incorrect Data: There may be missing or incorrect data in the order or the phases, such as missing operations, incorrect dates, or other configuration issues.
  
  
  Locked Resources: If the resources required for the phases are locked or not available, this can lead to the inability to dispatch or deallocate.
  
  
  Dependencies: There may be dependencies on other orders or phases that need to be resolved before the current phases can be dispatched or deallocated.
  
  
  Solutions:
  
  
  Check Order Status: Verify the status of the production or process order. Ensure that it is in a status that allows for dispatching or deallocation (e.g., not completed or technically closed).
  
  
  Review Capacity Planning: Check the capacity planning and scheduling for the resources involved. Ensure that there are no conflicts or constraints that would prevent the phases from being dispatched.
  
  
  Validate Data: Review the order and phase data for completeness and correctness. Ensure that all necessary operations and data are present and correctly configured.
  
  
  Unlock Resources: If resources are locked, work with your SAP administrator to unlock them or resolve any issues that are causing the lock.
  
  
  Resolve Dependencies: Check for any dependencies on other orders or phases and resolve them as necessary.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for additional guidance on the specific context of the error.
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CO02 (Change Production Order), CO03 (Display Production Order), or CM21 (Capacity Planning) to investigate and resolve the issue.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Roles and Authorizations: Ensure that the user has the necessary roles and authorizations to perform the actions related to dispatching or deallocating phases.
  
  If the issue persists after checking these areas, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in production planning and control.