How To Fix M3492 - Conversion factors for unit on main screen changeable only with BMMH6

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 492

• Message text: Conversion factors for unit on main screen changeable only with BMMH6

What causes this issue?

You want to change the conversion factors of an alternative unit that
appears on one of the main screens (for example, order unit); the unit
itself, however, must remain as it is. For this purpose, the conversion
factors must be given by the separate structure for units of measure
(BMMH6) - in the same way as if you were online.

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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3492 - Conversion factors for unit on main screen changeable only with BMMH6 ?

  The SAP error message M3492 indicates that the conversion factors for a unit of measure on the main screen can only be changed using the transaction code BMMH6. This error typically arises when users attempt to modify the conversion factors for a unit of measure in a context where such changes are restricted.
  Cause:
  The primary cause of this error is that the system is designed to restrict changes to conversion factors for units of measure in certain transactions or screens. The conversion factors can only be modified in the specific transaction BMMH6, which is used for maintaining units of measure and their conversion factors.
  Solution:
  To resolve this error, follow these steps:
  
  
  Use Transaction BMMH6:
  
  Navigate to transaction BMMH6 in your SAP system.
  Here, you can maintain the conversion factors for the unit of measure as needed.
  
  
  
  Check User Permissions:
  
  Ensure that you have the necessary permissions to access and modify unit of measure settings in BMMH6. If you do not have the required permissions, contact your SAP administrator.
  
  
  
  Review Documentation:
  
  If you are unsure about the changes you need to make, refer to SAP documentation or consult with your SAP functional team for guidance on how to properly maintain conversion factors.
  
  
  
  Training:
  
  If you frequently encounter this error, consider undergoing training on unit of measure management in SAP to better understand how to handle these settings.
  
  
  
  Related Information:
  
  Transaction BMMH6: This transaction is specifically designed for maintaining units of measure and their conversion factors. It allows users to define how different units relate to each other.
  Unit of Measure (UoM): In SAP, units of measure are critical for inventory management, sales, and purchasing processes. Understanding how to manage them effectively is essential for accurate data handling.
  SAP Help Portal: For more detailed information, you can refer to the SAP Help Portal or the specific documentation related to your version of SAP.
  
  By following these steps, you should be able to resolve the M3492 error and manage conversion factors for units of measure effectively.