use autohydro to calculate floating dock

[rickychen96]

hi! i am a freshman of autohydro, now i wanna calculate the floating dock with a ship.
my question is :when i fix the draft=4.2m,heel=0,trim=0,can i get the load of the tank in the floating dock automatically?
i had tried the command of "load, delta",but it was still appeared to empty tanks .please help me to fix it,thank you!

[petlily]

probably the tank capacity itself isn't big enough to achieve the equilibrium at the given draft of 4.2m. Check the displacement at 4.2m and compare with the selected tank capacity to ensure that the selected tanks can be partially or fully loaded to achieve the draft.