How To Fix CY405 - Operation was deallocated because of changes relevant to scheduling

SAP Error Message - Details

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 405

• Message text: Operation was deallocated because of changes relevant to scheduling

What causes this issue?

The operation was changed. The changes have effects on the operation
duration and the commitment situation of the capacities.
The operation is deallocated.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Dispatch the operation again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CY405 - Operation was deallocated because of changes relevant to scheduling ?

  The SAP error message CY405 indicates that an operation in a production order or a process order has been deallocated due to changes that are relevant to scheduling. This typically occurs when there are modifications to the order that affect the scheduling of operations, such as changes in the order's start or finish dates, changes in the resources assigned, or changes in the production quantities.
  Causes of CY405 Error
  
  Changes in Order Data: Modifications to the production order, such as changing the quantity, dates, or operations, can lead to the deallocation of operations.
  Resource Availability: If the resources (machines, labor) assigned to the operation are no longer available due to scheduling conflicts or maintenance, the operation may be deallocated.
  Capacity Planning Adjustments: Changes in capacity planning or resource allocation can also trigger this error.
  Manual Interventions: Manual changes made by users in the order or scheduling parameters can lead to this situation.
  
  Solutions to CY405 Error
  
  Review Changes: Check the changes made to the production order that triggered the error. This includes reviewing the order's scheduling parameters, quantities, and resource assignments.
  Reallocate Operations: If the operation has been deallocated, you may need to reallocate it manually. This can be done by adjusting the scheduling or reassigning resources.
  Check Resource Availability: Ensure that the resources required for the operation are available and not blocked by other orders or maintenance activities.
  Re-schedule the Order: If necessary, re-schedule the entire order to ensure that all operations are aligned with the current production plan.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling scheduling-related errors.
  
  Related Information
  
  Transaction Codes: You may use transaction codes like CO02 (Change Production Order) or CO03 (Display Production Order) to review and modify the production order.
  Logs and Messages: Check the logs for any additional messages or warnings that may provide more context about the changes that led to the deallocation.
  SAP Notes: Look for relevant SAP Notes that may address specific issues related to the CY405 error or provide patches and updates.
  User Roles and Authorizations: Ensure that users have the appropriate roles and authorizations to make changes to production orders, as unauthorized changes can lead to errors.
  
  By following these steps, you should be able to identify the cause of the CY405 error and implement a solution to resolve it.