Tab and Slot Feature : rAutodeskInventor

Tab and Slot Feature tab slot Bracket with Single Side Tab - For 1 Slot tab slot I'm trying to do a tab and Slot on a non-sheet metal part I can't figure out why it won't work, or what I need to select to get it to work

tabasco slot machine 005- 010 over the thickness for the width of the slot for cold rolled I normally make the slot longer than the tab by about 050 After