How To Fix CY421 - The capacity requirements are already split

CY421 - Overview

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 421

• Message text: The capacity requirements are already split

What causes this issue?

You are trying to allocate a capacity requirement directly to an
individual capacity. With this capacity requirement you are not dealing
with a split; however, the requirement has already been split.

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

You can only allocate a capacity requirement directly to an individual
capacity or person if it has not yet been split.

System Response

The allocation is terminated.

How to fix this error?

If you want to split or allocate a capacity requirement you can do this
on the dialog box "Split/allocate".

Error message extract from SAP system. Copyright SAP SE.

CY421 - Details

• The SAP error message CY421 ("The capacity requirements are already split") typically occurs in the context of capacity planning and production scheduling within SAP's Production Planning (PP) module. This error indicates that the system has detected that the capacity requirements for a particular operation or resource have already been split, and it cannot be split again.
  
  Cause:
  
  
  Capacity Splitting: The error arises when there is an attempt to split capacity requirements that have already been split. This can happen if:
  
  You are trying to re-schedule or re-plan an operation that has already been split into multiple segments.
  There are conflicting settings or configurations in the production order or routing that prevent further splitting.
  
  
  
  Resource Configuration: The configuration of the resources or work centers may not allow for further splitting due to specific settings in the capacity planning parameters.
  
  
  Order Status: The status of the production order may also play a role. If the order is in