How To Fix M3397 - Conversion may not be changed for base unit of measure

M3397 - Overview

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 397

• Message text: Conversion may not be changed for base unit of measure

What causes this issue?

You have attempted by batch input to specify conversion factors for the
base unit of measure.

System Response

However, this does not make any sense and is therefore stopped by the
system.

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3397 - Conversion may not be changed for base unit of measure ?

  The SAP error message M3397, "Conversion may not be changed for base unit of measure," typically occurs when there is an attempt to change the conversion factor for a material's base unit of measure in a way that is not allowed by the system. This can happen in various scenarios, such as when trying to modify the material master data or during certain transactions that involve unit conversions.
  
  Cause:
  
  Inconsistent Data: The error often arises when there are existing transactions or data that depend on the current conversion factors. Changing these factors could lead to inconsistencies in inventory, accounting, or reporting.
  Locked Data: The material may be locked for changes due to ongoing transactions or other processes that are using the material.
  Configuration Settings: The system configuration may restrict changes to the base unit of measure or its conversion factors to maintain data integrity.
  
  
  Solution:
  
  Check Existing Transactions: Before making changes, ensure that there are no