Button "stock determination" grayed in MIGO

Hi all,

I try to implement stock determination functionnality. Stock determination is working fine if I use transaction MB1A, or transation MB26 (picking list). But I want to use this functionnality with MIGO or MIGO_GI, and the problem is that the button "Stock determination" in MIGO is grayed and no way to activate it. I have tried the customizing in: Inventory Management and Physical Inventory > Settings for Enjoy Transactions > Settings for Goods Movements (MIGO) > Field Selection for MIGO but no way.

Do you have any idea?

Thanks for your help

Oliv