To use batch-specific material units of measure, you have to use Batch Management.
In the standard configuration of the R/3 System, batch-specific material units of measure are not active.
If you want to use batch-specific material units of measure, set the Batch-specific material units of measure active indicator.
You can also make the settings for this area in Customizing if the Batch-specific material units of measure not active indicator is set.
You cannot make the settings in the material master record until the Batch-specific material units of measure active indicator is set.