Formula Pro Error

[santacruz]

Has anyone tried working with formula pro lately? I'm trying to add some new formulas and I get an error "Oops! Something went wrong: nil"

Code: Tout sélectionner

addCat(3, "Category", "")

addCatVar(3, "A", "a", "unitless")
addCatVar(3, "B", "b", "unitless")
addCatVar(3, "C", "c", "unitless")


addSubCat(3, 1, "Sub", "")
aF(3, 1, "C=AB",U("A","B","C"))

and my printout is

Code: Tout sélectionner

I cannot solve C=AB because I don't know the value of multiple variables
I cannot solve C=AB because I don't know the value of multiple variables
I can solve B for C=AB
Oops! Something went wrong:   nil

How can I remedy this? I thought maybe it was a unit problem but I changed everything to unitless.