[D6] Why can't you have 0 Dice in a skill?

As far as I've read, it's completely possible to just stick pips onto a skill, instead of a whole die. Yet when I try to put in 0 dice, it says I need a minimum of 1. Either I'm wrong about how it works, or there's been a messup in the d6 sheets. EDIT: Apparently you can still put 0s, the warning doesn't do anything. Still, it's annoying.

Just my assumption, but the reason for the errors is because you can't roll zero dice (in real life especially). Not familiar with the D6 system, but I'm assuming "pips" are just modifiers to a roll?  If that's true, then why would you need to roll dice? The pip would be "roll" so you'd already know the result. If there is a particular character sheet you're working and you're trying to do something, having the code would be beneficial, because there are alternatives that could be done...for example 1d0+pips should work.  Or for the dice, you could just have 0+pips.

GV, Roll20's dice engine can handle telling it to roll 0d6 just fine. =)