Mortar maker advice

Hi Members of the Autonauts community I need some advice on why my code is failing. I am making a code with a MK2 BOT making a solo bot with speed upgrade and Brain Upgrade. the code fails after the bucket brakes around the water section any advice would be helpful if want will do pictures but on console so will be from phone.

Forever

until mortar storage 3 full

until hands full

move to crude bucket storage

take from crude bucket storage

Repeat rimes 1

move water

take water

move crude mortar

add crude mortar

Repeat rimes 1

move sand

take sand

move crude mortar

add crude mortar

stow held item

move to clay

take from clay

move crude mortar

add crude mortar

if hands empty

retrieve