How To Fix M3429 - Fixed lot size and max. lot size not possible in a single profile

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 429

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

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3429 - Fixed lot size and max. lot size not possible in a single profile ?

  The SAP error message M3429, which states "Fixed lot size and max. lot size not possible in a single profile," typically occurs in the context of material requirements planning (MRP) or production planning when there is a configuration issue with the lot size settings in the material master or the production version.
  Cause:
  This error arises when you attempt to configure a lot size profile that includes both a fixed lot size and a maximum lot size. In SAP, a lot size profile can only have one of these settings at a time. If both are defined, the system cannot determine which one to apply, leading to this error.
  Solution:
  To resolve this error, you need to review and adjust the lot size 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.
  Enter the material number and select the appropriate views (e.g., MRP or Work Scheduling).
  
  
  
  Check Lot Size Settings:
  
  Navigate to the MRP view and check the lot size settings.
  Ensure that you either set a fixed lot size or a maximum lot size, but not both.
  
  
  
  Adjust Lot Size Profile:
  
  If you are using a lot size profile, go to transaction code OMZB to maintain lot size profiles.
  Review the settings and ensure that only one type of lot size is defined (either fixed or maximum).
  
  
  
  Save Changes:
  
  After making the necessary adjustments, save the changes to the material master or lot size profile.
  
  
  
  Test the Configuration:
  
  After making the changes, run the MRP or production planning process again to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  
  Lot Size Types in SAP:
  
  Fixed Lot Size: A specific quantity that is produced or ordered every time.
  Maximum Lot Size: The maximum quantity that can be produced or ordered in one run.
  
  
  
  Transaction Codes:
  
  MM02: Change Material Master
  OMZB: Maintain Lot Size Profiles
  MD01: MRP Run
  
  
  
  Documentation:
  
  Refer to SAP Help documentation for detailed information on lot size settings and MRP configuration.
  
  
  
  By following these steps, you should be able to resolve the M3429 error and ensure that your lot size settings are correctly configured for your production planning needs.