How To Fix CY420 - Phases cannot be dispatched or deallocated

CY420 - Overview

• 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