[Closed] silly function problem

I made a function:

function quatrotate pt qt =
 (
   local qp = (quat pt.x pt.y pt.z 0)
   local res = (qt * qp) * (inverse qt)
   return [res.x, res.y, res.z]
 )

I tested each step to make sure it works in the MAXScript listener:

 pt = [1,0,0]
 [1,0,0]
 qt = cam.rotation
 (quat 0 -0.226418 0 0.97403)
  qp = (quat pt.x pt.y pt.z 0)
 (quat 1 0 0 0)
 res = (qt * qp) * (inverse qt)
 (quat 0.89747 0 0.441075 0)
 [res.x, res.y, res.z]
 [0.89747,0,0.441075]

^^ That works correctly.

Now I try to call the function on the same inputs:

quatrotate [1,0,0] cam.rotation
 -- Error occurred in quatrotate(); filename: D:\Professional & Academic\Professional\Shape from Video\PrintExtrinsic.ms; position: 94
 --  Frame:
 --   pt: [1,0,0]
 --   qt: (quat 0 -0.226418 0 0.97403)
 --   res: undefined
 --   qp: (quat 1 0 0 0)
 -- Unable to convert: [1,0,0] to type: Quaternion

How did I mess that up?

Also, second question:

Is there any way I can concatenate a Point3 + float to make a Quat, other than explicitly breaking it into components the way I did? And vice versa, to take the first 3 elements of a quat and store into Point3?