[BUG] ZeroDivisionError: float division by zero (SNRd)

[oesteban]

This is happening at least for 50299, 50355, 50281

Node: workflow_enumerator.anatMRIQCT1w.ComputeIQMs.measures
Working directory: /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/ComputeIQMs/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/measures

Node inputs:

air_msk = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/AirMaskWorkflow/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/ArtifactMask/sub-50299_T1w_conformed_noart-air.nii.gz
artifact_msk = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/AirMaskWorkflow/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/ArtifactMask/sub-50299_T1w_conformed_artifacts.nii.gz
head_msk = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/HeadMaskWorkflow/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/fsl_bet/sub-50299_T1w_conformed_corrected_brain_outskin_mask.nii.gz
ignore_exception = False
in_bias = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/AFNISkullStripWorkflow/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/inu_n4/sub-50299_T1w_conformed_bias.nii.gz
in_file = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/conform/sub-50299_T1w_conformed.nii.gz
in_fwhm = [3.30822, 3.11735, 3.55278, 3.32136]
in_noinu = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/ComputeIQMs/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/harmonize/sub-50299_T1w_conformed_corrected_harmonized.nii.gz
in_pvms = ['/scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/segmentation/segment_pve_0.nii.gz', '/scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/segmentation/segment_pve_1.nii.gz', '/scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/segmentation/segment_pve_2.nii.gz']
in_segm = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/segmentation/segment_seg.nii.gz
in_tpms = <undefined>
mni_tpms = ['/scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/ComputeIQMs/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/MNItpms2t1/mapflow/_MNItpms2t10/1mm_tpm_csf_trans.nii.gz', '/scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/ComputeIQMs/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/MNItpms2t1/mapflow/_MNItpms2t11/1mm_tpm_gm_trans.nii.gz', '/scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/ComputeIQMs/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/MNItpms2t1/mapflow/_MNItpms2t12/1mm_tpm_wm_trans.nii.gz']
rot_msk = /scratch/users/oesteban/abide-mriqc_0.9.5-2017-05-25-aacd887ad9af/work/workflow_enumerator/anatMRIQCT1w/AirMaskWorkflow/_in_file_..mnt..ABIDE..sub-50299..anat..sub-50299_T1w.nii.gz/RotationMask/sub-50299_T1w_conformed_rotmask.nii.gz

Traceback (most recent call last):
  File "/usr/local/miniconda/lib/python3.6/site-packages/nipype/pipeline/plugins/multiproc.py", line 52, in run_node
    result['result'] = node.run(updatehash=updatehash)
  File "/usr/local/miniconda/lib/python3.6/site-packages/nipype/pipeline/engine/nodes.py", line 372, in run
    self._run_interface()
  File "/usr/local/miniconda/lib/python3.6/site-packages/nipype/pipeline/engine/nodes.py", line 482, in _run_interface
    self._result = self._run_command(execute)
  File "/usr/local/miniconda/lib/python3.6/site-packages/nipype/pipeline/engine/nodes.py", line 613, in _run_command
    result = self._interface.run()
  File "/usr/local/miniconda/lib/python3.6/site-packages/nipype/interfaces/base.py", line 1081, in run
    runtime = self._run_wrapper(runtime)
  File "/usr/local/miniconda/lib/python3.6/site-packages/nipype/interfaces/base.py", line 1029, in _run_wrapper
    runtime = self._run_interface(runtime)
  File "/usr/local/miniconda/lib/python3.6/site-packages/mriqc/interfaces/anatomical.py", line 118, in _run_interface
    for tlabel in ['csf', 'wm', 'gm']}
  File "/usr/local/miniconda/lib/python3.6/site-packages/mriqc/interfaces/anatomical.py", line 118, in <dictcomp>
    for tlabel in ['csf', 'wm', 'gm']}
  File "/usr/local/miniconda/lib/python3.6/site-packages/mriqc/qc/anatomical.py", line 228, in snr_dietrich
    return float(mu_fg / (sigma_air * sqrt(2/(4 - pi))))
ZeroDivisionError: float division by zero
Interface StructuralQC failed to run.