Error while running event Wave_Defense_Unlimited::on_rocket_launched (ID 10)
Wave_Defense_Unlimited/wd-freeplay.lua:731: attempt to perform arithmetic on field 'wave_power' (a nil value)
stack traceback:
Wave_Defense_Unlimited/wd-freeplay.lua:731: in function 'spawn_units'
Wave_Defense_Unlimited/wd-freeplay.lua:609: in function 'wave_end'
Wave_Defense_Unlimited/wd-freeplay.lua:161: in function <Wave_Defense_Unlimited/wd-freeplay.lua:153>

and its another error while set the wave to 500.
the bug's hp will greater than 2147483647(dw?)