How To Fix COSE028 - Scheduling sequence & operation &: Invalid combination of dates

COSE028 - Overview

• Message type: E = Error

• Message class: COSE - Change Production Order

• Message number: 028

• Message text: Scheduling sequence & operation &: Invalid combination of dates

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message COSE028 - Scheduling sequence & operation &: Invalid combination of dates ?

  The SAP error message COSE028, which states "Scheduling sequence & operation &: Invalid combination of dates," typically occurs in the context of production planning and scheduling within the SAP system. This error indicates that there is an inconsistency or conflict in the dates associated with a scheduling sequence or operation in a production order or process order.
  Causes:
  
  Date Conflicts: The start and finish dates of operations or sequences may overlap or be set incorrectly, leading to an invalid scheduling scenario.
  Missing Dates: Required dates for operations or sequences may not be defined, causing the system to be unable to schedule them properly.
  Incorrect Dependencies: The dependencies between operations (e.g., predecessor/successor relationships) may not be set correctly, leading to scheduling conflicts.
  Capacity Constraints: If the resources (work centers) are not available during the specified dates, it can lead to scheduling issues.
  Calendar Settings: The factory calendar or work schedule may not align with the operation dates,