[Closed] pickpoint inside a callback

Here’s a simplified version of what I’m trying to do. There’s a callback script monitorig selections and when certain object comes to focus it sticks to the mouse and moves along the surface of specified object. The pickpoint callback works when it is run separately from the selection callback, but when it’s run within it, max pretty much halts and doesn’t do anything untill escape is pressed.

---mousemovecallback function----
fn mou ai obj=
( 
  b=mapscreentoworldray mouse.pos
  hitt=intersectray proj b
  if hitt!=undefined then obj.pos=hitt.pos
)

---callback string---
n="obj=(getcurrentselection())[1]
p=finditem anchors obj
if p!=0 then 
(
  pickpoint mousemovecallback:#(mou, obj)
)"

callbacks.addScript #modPanelSelChanged n

I kinda ripped this out of context so there may be variables seemingly pointing nowhere, nevermind that. The only important thing is why the pickpoint wont work here. Even plainly pickpoint() has the same effect, not only mousemovecallback.

Is there any way around this? Or can someone think of alternative method of performing the task described earlier?