"Unable to cast double to Vector3"?

Okay so I do this following script to move a model to this position:

workspace.V:MoveTo(workspace.V.Torso.xx.Value,
workspace.V.Torso.yy.Value,
workspace.V.Torso.zz.Value)

"workspace.V:MoveTo(workspace.V.Torso .xx.Value,workspace.V.Torso.yy.Value, workspace.V.Torso.zz.Value)"

And when I did that, the output says, "Unable to cast double to Vector3"

What is really the error?