'newsegment = True' option in .ini make preprocess failed

[hcherkaoui]

Using newsegment = True in my .ini gave me:

2017-11-23 07:32:05,919:INFO: found SPM directory to be "/home/hcherkaoui/opt/spm8/spm8/spm8_mcr/spm8"
2017-11-23 07:32:05,919:INFO: using SPM version: 8
2017-11-23 07:32:05,919:INFO: setting SPM MCR path to "/home/hcherkaoui/opt/spm8/spm8.sh" and "use_mcr" to True
2017-11-23 07:32:05,919:INFO: SPM configuration succeeded using SPM MCR.
2017-11-23 07:32:06,029:INFO: found SPM directory to be "/home/hcherkaoui/opt/spm8/spm8/spm8_mcr/spm8"
2017-11-23 07:32:06,029:INFO: using SPM version: 8
2017-11-23 07:32:06,029:INFO: setting SPM MCR path to "/home/hcherkaoui/opt/spm8/spm8.sh" and "use_mcr" to True
2017-11-23 07:32:06,029:INFO: SPM configuration succeeded using SPM MCR.
/home/hcherkaoui/.local/lib/python2.7/site-packages/pypreprocess/conf_parser.py:371: UserWarning: subject .: No func images found for wildcard /home/hcherkaoui/DATA/20161130_e00521_REGLAGE02_REGLAGE02/nii/./s005a1001_epi3p4mm.nii
  " wildcard %s" % (subject_id, sess_func_wildcard)))
Using the following parameters for preprocessing:
	normalize=False
	coreg_anat_to_func=False
	slice_timing_software=spm
	output_modulated_tpms=True
	func_write_voxel_sizes=[3.0, 3.0, 3.0]
	anat_write_voxel_sizes=[1.0, 1.0, 1.0]
	dataset_description= Claire resting state done on the PET-MR machine
in the SHFJ.

	smooth_software=spm
	realign_software=spm
	register_to_mean=True
	deleteorient=False
	dataset_dir=/home/hcherkaoui/DATA/20161130_e00521_REGLAGE02_REGLAGE02/nii
	report=True
	dataset_id=/home/hcherkaoui/DATA/20161130_e00521_REGLAGE02_REGLAGE02/nii
	realign_reslice=False
	segment=True
	coregister_software=spm
	anat_fwhm=0.0
	spm_dir=None
	dartel=False
	coregister_reslice=False
	fwhm=[5.0, 5.0, 5.0]
	newsegment=True
	realign=True
	coregister=True
	slice_timing=False
	caching=True
	tsdiffana=True
	matlab_exec=None
/home/hcherkaoui/.local/lib/python2.7/site-packages/pypreprocess/nipype_preproc_spm_utils.py:1575: UserWarning: There is only one subject. Disabling NewSegment.
  warnings.warn("There is only one subject. Disabling NewSegment.")
[Memory]    0.0s, 0.0min: Loading niigz2nii from /home/hcherkaoui/DATA/20161130_e00521_REGLAGE02_REGLAGE02/nii/pypreprocess_output/./cache_dir/joblib/pypreprocess/io_utils/niigz2nii/ae65cdb6bda6a312081494669386d261
___________________________________________niigz2nii cache loaded - 0.0s, 0.0min

Preproc report for subject . written to /home/hcherkaoui/DATA/20161130_e00521_REGLAGE02_REGLAGE02/nii/pypreprocess_output/reports/report_preproc.html .

2017-11-23 07:32:07,708:INFO: found SPM directory to be "/home/hcherkaoui/opt/spm8/spm8/spm8_mcr/spm8"
2017-11-23 07:32:07,708:INFO: using SPM version: 8
2017-11-23 07:32:07,709:INFO: setting SPM MCR path to "/home/hcherkaoui/opt/spm8/spm8.sh" and "use_mcr" to True
2017-11-23 07:32:07,709:INFO: SPM configuration succeeded using SPM MCR.
Traceback (most recent call last):
  File "nilearn_claire5_preproc_spm.py", line 16, in <module>
    results = do_subjects_preproc(jobfile, dataset_dir=dataset_dir)[0]
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/pypreprocess/nipype_preproc_spm_utils.py", line 1722, in do_subjects_preproc
    **preproc_params)
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/pypreprocess/nipype_preproc_spm_utils.py", line 1411, in _do_subjects_newsegment
    ignore_exception=True)
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/nipype/caching/memory.py", line 73, in __call__
    interface.inputs.set(**kwargs)
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/traits/util/deprecated.py", line 32, in wrapper
    return fn(*args, **kw)
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/traits/has_traits.py", line 1552, in set
    trait_change_notify=trait_change_notify, **traits)
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/traits/has_traits.py", line 1544, in trait_set
    setattr( self, name, value )
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/nipype/interfaces/base.py", line 2043, in validate
    value = super(MultiPath, self).validate(object, name, newvalue)
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/traits/trait_types.py", line 2337, in validate
    return TraitListObject( self, object, name, value )
  File "/home/hcherkaoui/.local/lib/python2.7/site-packages/traits/trait_handlers.py", line 2313, in __init__
    raise excp
traits.trait_errors.TraitError: /home/hcherkaoui/DATA/20161130_e00521_REGLAGE02_REGLAGE02/nii/pypreprocess_output/T1.nii.gz is not included in allowed types: .hdr, .nii, .img```

note that ```/home/hcherkaoui/DATA/20161130_e00521_REGLAGE02_REGLAGE02/nii/pypreprocess_output/T1.nii``` exist and is a valid .nii