[quote=Roast Rabbit]Does the character have the "ship" item?
The slot item needs to already exist in the player’s inventory before an item can be assigned to it. edited by mek on 9/4/2014[/quote]
That’s the only thing I can think of too, glancing at your links. With ‘pocket-type’ sections of inventory, they have to be awarded to the player before they can be used. Treat them as a normal item before you treat them as pockets, if that make sense? (And I’d do at the earliest possible opportunity, before any other stuff can be collected. Makes things a lot easier.)