Slice row filter condition for child record in list

[Seth_Berman]

I have an app containing a shopping cart similar to the sample app Order Capture. It has a two tables with a parent child relationship to relate orders with individual products ordered.

I am trying to create a slice of the parent table to filter out orders that have already shipped completely from those that have not had all individual products ship. I have created a column in the child table that the user will set a true flag when the product ships, this column has an initial value of false. The parent table contains the List half of the ref relationship between the two tables the ref in the child table is set with ISPARTOF.

i tried using this formula on Slice of the Parent Table, it did not error but it didn’t display anything.
IN(“FALSE”,[Child List Column][Shipped?])