Constant Vector as Argument in PPL

[NumericDavid]

May we concentrate on the actual calculator? Differences between Mac or Windows VC are less important to me.

I just entered into a physical HP Prime G2 the program:
verbatim"
EXPORT BLA()
BEGIN
normalize([0,0,-1])
END;
"
By tapping the "Run" virtual button in the Program Catalog view, i obtain the answer:
verbatim"
BLA [0,0.31511344578,
0.904534033733,0,0,
-0.301511344578]
"
Which is unexpected to me.

On contrast, if i omit the "-" symbol in the program above, i obtain, by "Run" the answer:
verbatim"
BLA [0,0,1]
"
Which is what i'd expect.