How To Fix MILL_OC028 - Opn &1: Parallel sequence &2 is split

SAP Error Message - Details

• Message type: E = Error

• Message class: MILL_OC - Messages for order combination

• Message number: 028

• Message text: Opn &1: Parallel sequence &2 is split

What causes this issue?

During combination by operation, you selected the go-to and from
operation in such as way that the parallel sequence would be split as a
result. However, parallel sequences cannot be split.

System Response

The system terminates the operation.

How to fix this error?

Select the go-to and from operation in the master sequence so that the
complete parallel sequence is included in combination by operation, or
remove the start and end operation of the parallel sequence from the
combination.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MILL_OC028 - Opn &1: Parallel sequence &2 is split ?

  The SAP error message MILL_OC028, which states "Opn &1: Parallel sequence &2 is split," typically occurs in the context of production planning and scheduling within the SAP system, particularly in the manufacturing module. This error indicates that there is an issue with the parallel processing of operations in a routing or production order.
  Cause:
  
  Routing Configuration: The routing for the production order may have been set up incorrectly, leading to a situation where operations that are supposed to run in parallel are not properly defined.
  Order Splitting: The production order may have been split due to capacity constraints or scheduling issues, causing the parallel operations to be separated.
  Capacity Issues: If the work center does not have enough capacity to handle the parallel operations, the system may split the sequence, leading to this error.
  Incorrect Sequence Definition: The sequence of operations may not be defined correctly in the routing, causing the system to interpret them as non-parallel.
  
  Solution:
  
  Check Routing: Review the routing for the production order to ensure that the operations are defined correctly for parallel processing. Ensure that the operations are set up to run in parallel and that the sequence is correct.
  Adjust Capacity: If the issue is related to capacity, consider adjusting the capacity of the work center or rescheduling the production order to ensure that the necessary resources are available.
  Review Order Splitting: Check if the production order has been split and, if necessary, consolidate the order or adjust the scheduling parameters to prevent splitting.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling parallel sequences and operations in your version of SAP.
  Contact Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CO02 (Change Production Order) or CA03 (Display Routing) to investigate the production order and routing details.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Training: Ensure that users involved in production planning and scheduling are trained on how to properly set up routings and manage production orders to avoid such issues in the future.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.