DL-FIND error with hdlc

Hi,

I was trying to do a QM/MM calculation using HDLC but I got the following error in the output file

DL-FIND ERROR:
No residues present in dfl_hdlc_init

Below is my input file

from chemsh import *
from chemsh.cluster.getFrozen import getNotQM

# Creation of mfi cluster fragment
mfi = Fragment(coords='cupc2.pun', connect_mode='covalent')

ff = 'zeolite_gulp.ff'

# Parameters of the qmmm object
qm_theory = ORCA(method='dft', functional="b3lyp", basis="def2-svp", scftype='uks',mult=2, optstr='!D3BJ def2/J RIJCOSX ',path="/share/apps/orca/orca_5_0_2_linux_x86-64_shared_openmpi411/orca",nprocs=16)

mm_theory = GULP(ff=ff,conjugate=True)

#get active region which will be optimized
active_region = mfi.getRegion(1,3)
qm_region = mfi.getRegion(1)

# Parameters of boundary_charge_adjust function in qmmm.py file
silicate_modifiers = {("Si","o1"):0.3}
reverse_silicate_modifiers = {("Si","o1"):-0.3}

# Creation of qmmm object
qmmm = QMMM(qm=qm_theory,
mm=mm_theory,
frag=mfi,
coupling='covalent',
qm_region=qm_region,
embedding='electrostatic',
dipole_adjust=True)

# Using a looser than usual tolerance to ensure quick convergence
opt = Opt(theory=qmmm,
algorithm="lbfgs", coordinates='hdlc', tolerance=0.0045, trust_radius="energy",
maxcycle=500, maxene=500, active=active_region,save_path=True)

opt.run()

# Saving of optimized cluster
mfi.save('cupc2_opt.pun', 'pun')
mfi.save('cupc2_opt.xyz', 'xyz')