Error in loop modeling protocol its showing error "NameError: name 'ccd_closure' is not defined"

I stuck again loop modeling protocol test file is not running. its showing error "NameError: name 'ccd_closure' is not defined"

Log+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++log

setting up movers
core.fragments.ConstantLengthFragSet: finished reading top 200 3mer fragments fr
om file test_in.frag3
core.chemical.ResidueTypeSet: Finished initializing centroid residue type set.
Created 1980 residue types
set up job distributor
randomizing loop
low res loop modeling
Traceback (most recent call last):
File "loops.py", line 89, in
ccd_closure.apply(p)
NameError: name 'ccd_closure' is not defined

C:\Users\Zebrafish\Desktop\LOOPmodeing\loop_modeling\loop_modeling>