How To Fix /SAPAPO/RET_MESSAGES136 - The time unit must be shift to be able to maintain reference shifts

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/RET_MESSAGES -

• Message number: 136

• Message text: The time unit must be shift to be able to maintain reference shifts

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/RET_MESSAGES136 - The time unit must be shift to be able to maintain reference shifts ?

  The SAP error message /SAPAPO/RET_MESSAGES136 indicates that there is an issue with the time unit configuration in the SAP Advanced Planning and Optimization (APO) system, specifically related to maintaining reference shifts. This error typically arises when the time unit set for a planning object does not allow for the necessary shifts to be defined or adjusted.
  Cause:
  
  Incompatible Time Unit: The time unit defined for the planning object (e.g., days, hours) may not support the concept of shifts. For example, if the time unit is set to days, it may not allow for the definition of shifts that are typically measured in hours.
  Configuration Issues: There may be a misconfiguration in the planning area or the master data that prevents the system from recognizing the shifts correctly.
  Reference Shift Settings: The reference shifts may not be properly defined or may conflict with the current time unit settings.
  
  Solution:
  
  
  Check Time Unit Configuration:
  
  Navigate to the relevant planning area in the SAP APO system.
  Verify the time unit settings and ensure that they are compatible with the shifts you want to maintain. If necessary, change the time unit to one that supports shifts (e.g., hours instead of days).
  
  
  
  Adjust Reference Shifts:
  
  Go to the settings for reference shifts and ensure that they are correctly defined. Make sure that the shifts align with the time unit you are using.
  If you need to create or modify reference shifts, ensure that the time unit allows for such adjustments.
  
  
  
  Review Planning Area Settings:
  
  Check the configuration of the planning area to ensure that it is set up correctly to handle shifts. This may involve reviewing the settings in the SAP APO configuration transaction (e.g., /SAPAPO/SDP).
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for detailed guidance on configuring time units and shifts in SAP APO.
  
  
  
  Testing:
  
  After making changes, test the configuration by attempting to maintain reference shifts again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on configuring time units and shifts.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Training and Documentation: Consider reviewing training materials or documentation related to SAP APO configuration, particularly around time management and shifts.
  
  By following these steps, you should be able to resolve the error message and successfully maintain reference shifts in your SAP APO system.