Remove buildable unit from building - how?

[gameshow]

I have a building. it can train a unit. I want to be able to, using triggers, add and remove the ability to train this unit. How?

Right now the unit in question is a "techtree - units sold", not "techtree - units trained".

 

[bugbear]

• Untitled Trigger 002
  • Events
    • Unit - A unit Sells a unit
  • Conditions
    • (Unit-type of (Sold unit)) Equal to Footman
  • Actions
    • Player - Make (Unit-type of (Sold unit)) Unavailable for training/construction by (Owner of (Sold unit))

That's a bare bones of the trigger you could use.

 

[vypur85]

Items in marketplace can only be removed via triggers if they are added through trigger in the first place. Meaning, you need to add the sold units through trigger in the beginning of the game, so that you're able to remove them later. To add/remove, check out these actions:

Neutral building - Add/Remove unit from/to marketplace...