Problem in building a one compartment or several compartments cell

Hello, I try to use BMTK to build a one compartment cell, I deleted all lines in morphology file except the first line for soma:

1 1 356.5848 666.8376 28.56 6.4681 -1

it comes the error:

NEURON: x : object prefix is NULL
near line 0
^
Import3d_SWC_read[0].mksections()
Import3d_SWC_read[0].input("./biophys_...")
Biophys1[0].init("./biophys_...")

If I left two more lines in .swc file to build a two compartments cell:

1 1 356.5848 666.8376 28.56 6.4681 -1
2 3 354.1858 672.2133 28.4684 0.1608 1

It comes another error:

NEURON: section in the object was deleted
near line 0
{soma { pt3dadd(363.053, 666.838, 28.56, 12.9362) }}
^
*** longjmp causes uninitialized stack frame ***:

This is my method to build the network:

net = NetworkBuilder('BL')
net.add_nodes(cell_name='BL',
potental='exc',
model_type='biophysical',
model_template='ctdb:Biophys1.hoc',
model_processing='aibs_perisomatic',
dynamics_params='fit_parameters.json',
morphology='reconstruction.swc')
net.build()
net.save_nodes(output_dir='network')

How to solve these problems and is there any right way to build a one compartment or several compartments cell?

Start at the NetworkBuilder call in the issue and inspect how ctdb:Biophys1.hoc processes reconstruction.swc and fit_parameters.json. Reproduce the one- and two-compartment cases using the shown morphology lines, then verify that net.build() and net.save_nodes(output_dir='network') complete without the reported NEURON errors.