Steps:

1.In the item table, select “Yes” from the dropdown list box of the property “Inventory constraint flag” of the target item.
2.When you want to enable inventory constraints for an item, you also need to make the same setting in the scheduling parameter settings.

Steps:

1.Click on the [Scheduling Parameter Settings] button on the toolbar. Or, select [Schedule] – [Scheduling Parameter Settings…] from the menu. Properties of the current scheduling parameter will be displayed in the properties window.
2.Select the General tab of the properties window.
3.Check the property “Enable inventory constraints”.