How To Fix M3427 - Fixed lot size and rounding value not possible in a single profile

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 427

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

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message M3427 - Fixed lot size and rounding value not possible in a single profile ?

  The SAP error message M3427, which states "Fixed lot size and rounding value not possible in a single profile," typically occurs in the context of material requirements planning (MRP) or production planning when there is a conflict in the configuration of lot sizing procedures for a material.
  Cause:
  This error arises when you attempt to configure a lot size profile that includes both a fixed lot size and a rounding value. In SAP, a fixed lot size means that the system will always produce or procure a specific quantity of a material, while a rounding value indicates that the quantity should be rounded to the nearest specified value. These two settings are mutually exclusive in a single lot size profile, leading to the error.
  Solution:
  To resolve this error, you need to adjust the lot size profile settings in the material master or the relevant configuration settings. Here are the steps you can take:
  
  
  Access Material Master:
  
  Go to transaction code MM02 to change the material master data.
  Enter the material number and select the appropriate views (usually MRP or Purchasing).
  
  
  
  Check Lot Size Settings:
  
  Navigate to the MRP view and check the lot size settings.
  If a fixed lot size is defined, remove the rounding value or vice versa.
  
  
  
  Adjust Lot Size Profile:
  
  If you are using a lot size profile, go to transaction code OMZB (or the relevant configuration transaction) to check the lot size profile settings.
  Ensure that the profile does not have conflicting settings (i.e., both fixed lot size and rounding value).
  
  
  
  Save Changes:
  
  After making the necessary adjustments, save the changes to the material master or the lot size profile.
  
  
  
  Test the Configuration:
  
  Run the MRP or production planning process again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  
  Lot Sizing Procedures: Familiarize yourself with different lot sizing procedures available in SAP, such as:
  
  Fixed Lot Size (FX): Always produces or procures a fixed quantity.
  Rounding Value (RV): Rounds the quantity to the nearest specified value.
  
  
  
  Material Master Views: Understand the different views in the material master that affect MRP and production planning, including MRP, Purchasing, and Work Scheduling views.
  
  
  SAP Documentation: Refer to SAP Help documentation for detailed information on lot sizing and MRP configuration.
  
  
  Transaction Codes:
  
  MM02: Change Material Master
  OMZB: Maintain Lot Size Profiles
  MD01: MRP Run
  
  
  
  By following these steps and understanding the underlying concepts, you should be able to resolve the M3427 error effectively.