Post: #2

Try to create more descriptive threads, 'error' is not, so another users can solve their problems also by using the Search button.

Empty bottles doesn't have this attr by default so I guess you added it manually? Items will decay automatically when their timer expire (and the timer will be setup when droping on ground, in example, excepting for items with attr_move_never which are not decaying never (this is the only situation I can imagine now to force attr_decay).

Resuming: You don't need attr_decay, however you just have to use .xtimer N or .set timer N (where N is the amount of seconds to decay).