setDynamicProperty?

Can set dynamic property be used in this way this should check if a chest is placed and check which (chest placer item) the person is holding. My goal is to be able to grab this later upon a scoreboard condition being met in order to decide which loot table each chest should pull from. But at the end on the last if statment I have sendMessage and that message never send. Which kinda makes me feel like perhaps this logic is flawed? I always have my error log on and I'm getting nothing atm when using my chest placer items. Any help is appreciated thx in advance!