How To Fix M3671 - Fixed lot size must be a multiple of the rounding value

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 671

• Message text: Fixed lot size must be a multiple of the rounding value

What causes this issue?

The lot size you have entered is not a multiple of the rounding value.

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

System Response

How to fix this error?

Enter an appropriate lot size.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3671 - Fixed lot size must be a multiple of the rounding value ?

  The SAP error message M3671, which states "Fixed lot size must be a multiple of the rounding value," typically occurs in the context of material management and production planning. This error indicates that the fixed lot size defined for a production or procurement process is not compatible with the rounding value specified for that material.
  Cause:
  
  Fixed Lot Size: This is the predetermined quantity of a material that is produced or procured in one batch.
  Rounding Value: This is the value to which the lot size is rounded. It is often defined to ensure that production or procurement quantities are in line with packaging, handling, or other operational constraints.
  Incompatibility: The error arises when the fixed lot size is not a multiple of the rounding value. For example, if the fixed lot size is set to 100 units and the rounding value is set to 20 units, this would be acceptable. However, if the fixed lot size is set to 105 units, it would trigger the error because 105 is not a multiple of 20.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Adjust the Fixed Lot Size:
  
  Change the fixed lot size to a value that is a multiple of the rounding value. For example, if the rounding value is 20, you could set the fixed lot size to 100, 120, 140, etc.
  
  
  
  Modify the Rounding Value:
  
  If it is appropriate for your business process, you can change the rounding value to a number that is a factor of the current fixed lot size. However, this may have implications for other processes, so it should be done with caution.
  
  
  
  Check Material Master Data:
  
  Review the material master data for the affected material. Ensure that both the fixed lot size and rounding value are set correctly according to your business requirements.
  
  
  
  Consult with Stakeholders:
  
  If you are unsure about the appropriate values for fixed lot size and rounding value, consult with production planners, procurement specialists, or other relevant stakeholders to determine the best approach.
  
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like MM02 (Change Material) to adjust the material master data.
  Configuration Settings: The settings for lot sizing and rounding can be found in the configuration settings under the material management module.
  Documentation: Refer to SAP documentation or help files for more detailed information on lot sizing procedures and best practices.
  
  By ensuring that the fixed lot size is a multiple of the rounding value, you can avoid encountering this error in the future.