How To Fix PPH_MRP168 - Period lot sizes only supported for one period

SAP Error Message - Details

• Message type: E = Error

• Message class: PPH_MRP -

• Message number: 168

• Message text: Period lot sizes only supported for one period

What causes this issue?

Your Customizing settings for lot sizing have been configured in such a
way that the requirements of several days, weeks, or months are to be
grouped together. However, MRP Live on SAP HANA does not support this
type of period lot-sizing procedures where several periods are grouped
together.
In classic MRP, the system uses the first shortage date as the period
start date. It then groups the requirements of the following "n" periods
based on this date. Since shortages of different materials can exist on
different days, it is possible that different groupings exist for each
material.
In MRP Live on SAP HANA, the system plans materials simultaneously
instead of sequentially. As a result, it is not possible to define
periods based on individual materials.

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

System Response

If a period lot-sizing procedure has been defined for a material in
Customizing and several periods are to be grouped together, the MRP Live
report plans the material using classic MRP.

How to fix this error?

If system performance is affected by planning in classic MRP, change the
lot-sizing procedure to one that is supported by MRP Live on SAP HANA.
For example, you want to group requirements in quarterly periods.
Instead of using a period lot-sizing procedure that groups three monthly
periods, you create a planning calendar with periods starting on the
January 1, April 1, July 1, and October 1.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPH_MRP168 - Period lot sizes only supported for one period ?

  The SAP error message PPH_MRP168 ("Period lot sizes only supported for one period") typically occurs in the context of Material Requirements Planning (MRP) when there is an issue with the configuration of lot sizing in the planning parameters for a material. This error indicates that the system is trying to apply a period lot size configuration that is not valid for the specified planning horizon.
  Cause:
  
  Lot Size Configuration: The error usually arises when the lot size settings for a material are configured to use a period lot size, but the planning parameters or the MRP run is set up in such a way that it expects a different configuration.
  Planning Horizon: If the planning horizon is set to more than one period, and the lot size is defined as a period lot size, the system cannot process this correctly, leading to the error.
  MRP Type: The MRP type assigned to the material may not support period lot sizes, or there may be inconsistencies in the settings.
  
  Solution:
  
  
  Check Lot Size Configuration:
  
  Go to the material master (transaction code MM03) and check the lot size settings in the MRP view.
  Ensure that the lot size is set correctly according to your planning needs. If you are using a period lot size, ensure that it is appropriate for the planning horizon.
  
  
  
  Adjust Planning Horizon:
  
  Review the planning horizon settings in the MRP parameters (transaction code OMD0 or OMD1).
  If the planning horizon is set to more than one period, consider adjusting it to match the period lot size configuration.
  
  
  
  Review MRP Type:
  
  Check the MRP type assigned to the material. Ensure that it is compatible with the lot size configuration you are using.
  If necessary, change the MRP type to one that supports period lot sizes.
  
  
  
  Run MRP Again:
  
  After making the necessary adjustments, run the MRP process again to see if the error persists.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  MM03: Display Material Master
  MD02: MRP Run
  OMD0/OMD1: MRP Parameter Configuration
  
  
  Documentation: Refer to SAP Help documentation for detailed information on lot sizing and MRP configuration.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  
  By following these steps, you should be able to resolve the PPH_MRP168 error and ensure that your MRP runs smoothly. If the issue persists, consider reaching out to your SAP support team for further assistance.