Debugger Error:Invalid scope kind

...then something is wrong somewhere else.
You mention removelist and removelink. Is it possible you're getting your objects and links mixed up?

Type mytype
  Field x
End Type
mylist:Tlist=CreateList()
For x = 1 To 10
  my:mytype = New mytype
  my.x = Rand(0,10)
  ListAddLast mylist,my
Next
Print CountList(mylist)
ListRemove(mylist,my)
Print CountList(mylist)
RemoveLink(mylist.lastlink())
Print CountList(mylist)
mylist.removelast
Print CountList(mylist)