Adding currency-/unit-supplying attribute to entity type with storage and use type 4.

Hi,

I'm new to SAP MDG and tried to add the ERP field LBKUM from table MBEW to the MDG MM entity MBEWACTNG. I got the error message USMD1080.

The currency-supplying or unit-supplying attribute MEINS must be a direct attribute of the entity type MBEWACTNG.

And as procedure I should select the attribute that supplies the currency or unit by calling input help.

The input help only contains the Currency/UoM Table T001 for the Attribute WAERS. How can I add the attribute MEINS?

Thanks for the help,

Marie