How To Fix M3428 - Fixed lot size and minimum lot size not possible in a single profile

M3428 - Overview

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 428

• Message text: Fixed lot size and minimum lot size not possible in a single profile

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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M3428 - Details

• The SAP error message M3428 indicates that there is a conflict in the configuration of lot sizes for a material in the system. Specifically, it arises when you attempt to set both a fixed lot size and a minimum lot size in the same lot size profile, which is not allowed.
  
  Cause:
  
  
  Configuration Conflict: The error occurs because the system does not allow a lot size profile to have both a fixed lot size and a minimum lot size defined simultaneously. A fixed lot size means that the system will always produce or order a specific quantity, while a minimum lot size indicates the smallest quantity that can be produced or ordered. These two settings are inherently contradictory.
  
  
  Material Master Settings: The error may also stem from the settings in the material master record, particularly in the MRP (Material Requirements Planning) views where lot size profiles are defined.
  
  
  
  Solution:
  To resolve the M3428 error, you