Half-casters & Cantrips question

[Mergon]

Hello all:

I am working at implementing the new Unearthed Arcana Artificer (Revisted):

http://dnd.wizards.com/articles/unea...icer-revisited

The class is a half caster with CANTRIPs. Is it even possible in HeroLab to make a half caster with cantrips?

When I try to add them everything seems to work except they come up in red with the error message: This class may only cast spells of up to level -1.

I've never put together a half caster class before, so I have never seen this error come up before and was wondering if it was a limit in Hero Lab itself.