How To Fix /SAPAPO/DMRES043 - Start of shift &1 earlier than start of shift &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/DMRES -

• Message number: 043

• Message text: Start of shift &1 earlier than start of shift &2

Self-Explanatory Message

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• What is the cause and solution for SAP error message /SAPAPO/DMRES043 - Start of shift &1 earlier than start of shift &2 ?

  The SAP error message /SAPAPO/DMRES043 indicates that there is a conflict in the scheduling of shifts in the Advanced Planning and Optimization (APO) module. Specifically, the error states that the start time of one shift (&1) is earlier than the start time of another shift (&2). This typically occurs when there are overlapping or incorrectly defined shifts in the planning process.
  Cause:
  
  Overlapping Shifts: The start time of a new shift overlaps with an existing shift, which is not allowed in the scheduling logic.
  Incorrect Shift Definitions: The shift definitions in the system may have been set up incorrectly, leading to conflicts in the scheduling.
  Data Entry Errors: Manual entry errors when defining shifts or scheduling resources can lead to this issue.
  
  Solution:
  
  
  Review Shift Definitions: Check the definitions of the shifts in the system. Ensure that the start and end times of each shift do not overlap. You can do this by navigating to the shift definitions in the APO module and verifying the time settings.
  
  
  Adjust Shift Scheduling: If you find that shifts are overlapping, adjust the start and end times of the shifts to ensure they are scheduled correctly. Make sure that the shifts are defined in a way that they do not conflict with each other.
  
  
  Check Resource Allocation: Ensure that the resources assigned to the shifts are not double-booked. Each resource should only be assigned to one shift at a time.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidance on how to properly set up shifts and scheduling in APO.
  
  
  Testing: After making adjustments, test the scheduling again to ensure that the error does not reoccur.
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like /SAPAPO/SHIFT to manage shifts or /SAPAPO/RES to manage resources.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on this error.
  User Roles: Ensure that the user has the appropriate permissions to modify shift definitions and scheduling settings.
  
  By following these steps, you should be able to resolve the error and ensure that your shift scheduling in SAP APO is functioning correctly.