Exactly how much fuel is at your homeworld? I'm just wondering if too much fuel can cause a problem.
Steve
2 399 870 555 Litres. I have modified the start setting by putting 5 billion for the population.
Edit: I have checked by SM the quantity of fuel in my homeworld, and you are right, no more error message now, and when I give a refuel order to my ship group, they are refueling.