How To Fix 8B318 - Unit of measure &1 cannot be converted to &2 for material &3

8B318 - Overview

• Message type: E = Error

• Message class: 8B - Localization (Brazil)

• Message number: 318

• Message text: Unit of measure &1 cannot be converted to &2 for material &3

What causes this issue?

To calculate certain taxes (e.g. 'IPI Pauta' or 'Sub.Trib.') in
Brazilian tax calculation, you have to convert using various units of
measure. This conversion is not possible using the units of measure/
material combination you have specified.

System Response

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

How to fix this error?

Maintain the conversion rules for the units of measure/material
combination specified or use other units of measure for this particular
business transaction.

Error message extract from SAP system. Copyright SAP SE.

8B318 - Details

• The SAP error message 8B318 indicates that there is an issue with the conversion of units of measure (UoM) for a specific material. This error typically arises when the system is unable to convert the specified unit of measure (UoM) to another unit of measure for a given material. Here’s a breakdown of the cause, potential solutions, and related information:
  
  Cause:
  
  Missing Conversion Factors: The conversion factors between the two units of measure are not defined in the system.
  Incorrect UoM Configuration: The units of measure may not be correctly configured in the material master or the relevant settings.
  Material Master Issues: The material master record may not have the necessary UoM settings or may be incomplete.
  Inconsistent UoM Usage: The UoM being used in the transaction may not be compatible with the UoM defined for the material.
  
  
  Solution:
  
  
  Check Material Master:
  
  Go to the material master record (transaction code MM03).
  Check the "Units of Measure" view to ensure