How To Fix M3449 - Ordering costs require lot size (materials planning)

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 449

• Message text: Ordering costs require lot size (materials planning)

What causes this issue?

You have selected ordering costs for copying to the profile. However,
they can only be copied if you also specify a lot size (materials
planning) in the profile.

How to fix this error?

Select the lot size on the selection screen.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3449 - Ordering costs require lot size (materials planning) ?

  The SAP error message M3449, which states "Ordering costs require lot size (materials planning)," typically occurs in the context of materials planning and procurement processes. This error indicates that the system requires a lot size to be defined for the material in question, particularly when ordering costs are involved in the planning process.
  Cause:
  
  Missing Lot Size Definition: The material master record for the relevant material does not have a lot size defined. Lot sizes are essential for determining how much of a material should be ordered or produced.
  Incorrect Configuration: The configuration settings in the material master or the related planning parameters may not be set up correctly, leading to the requirement for a lot size not being met.
  Planning Strategy: The planning strategy assigned to the material may require a lot size for the calculation of ordering costs, but it is not defined.
  
  Solution:
  
  
  Define Lot Size in Material Master:
  
  Go to the material master record (transaction code MM02).
  Navigate to the "MRP" (Material Requirements Planning) view.
  Ensure that a lot size is defined in the "Lot Size" field. Common lot sizes include fixed lot size, lot-for-lot, or other relevant options based on your business needs.
  
  
  
  Check Planning Parameters:
  
  Review the planning parameters in the material master to ensure they are set correctly. This includes checking the MRP type and planning strategy.
  If necessary, adjust the parameters to align with your business processes.
  
  
  
  Review MRP Settings:
  
  Check the MRP settings in the configuration (transaction code SPRO) to ensure that the lot size requirements are correctly configured for the relevant materials and planning strategies.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific details on how to set up lot sizes and MRP parameters.
  
  
  
  Testing:
  
  After making the necessary changes, run the MRP process again to see if the error persists. You can use transaction code MD02 or MD03 to run MRP for the material.
  
  
  
  Related Information:
  
  
  Lot Size Types: Common types of lot sizes include:
  
  Fixed Lot Size: A specific quantity that is always ordered.
  Lot-for-Lot: Orders exactly what is needed for the period.
  Minimum/Maximum Lot Size: Defines minimum and maximum quantities for orders.
  
  
  
  MRP Types: Different MRP types (like PD, VB, etc.) can affect how lot sizes are handled in planning.
  
  
  Planning Strategies: Different planning strategies (like make-to-stock, make-to-order) may have specific requirements regarding lot sizes.
  
  
  Transaction Codes:
  
  MM02: Change Material Master
  MD02: MRP Run for Single Item
  MD03: MRP Run for Individual Planning
  SPRO: Access to SAP Customizing Implementation Guide
  
  
  
  By addressing the lot size definition and ensuring that all related settings are correctly configured, you should be able to resolve the M3449 error in SAP.