Some subjects have missing values for C5 level in DWI data

[valosekj]

During level analysis of multi-subject dataset by generate_figures.py I found out that some subjects have missing values for C5 level in DWI data. Other levels are okay for these subjects.
Specifically:

Value for sub-dresden02 at level 5 in spinal cord is None or missing.
Value for sub-dresden02 at level 5 in white matter is None or missing.
Value for sub-dresden02 at level 5 in gray matter is None or missing.
Value for sub-dresden02 at level 5 in dorsal columns is None or missing.
Value for sub-dresden02 at level 5 in lateral funiculi is None or missing.
Value for sub-dresden02 at level 5 in ventral funiculi is None or missing.
Value for sub-balgrist02 at level 5 in spinal cord is None or missing.
Value for sub-balgrist02 at level 5 in white matter is None or missing.
Value for sub-balgrist02 at level 5 in gray matter is None or missing.
Value for sub-balgrist02 at level 5 in dorsal columns is None or missing.
Value for sub-balgrist02 at level 5 in lateral funiculi is None or missing.
Value for sub-balgrist02 at level 5 in ventral funiculi is None or missing.
Value for sub-queensland04 at level 5 in spinal cord is None or missing.
Value for sub-queensland04 at level 5 in white matter is None or missing.
Value for sub-queensland04 at level 5 in gray matter is None or missing.
Value for sub-queensland04 at level 5 in dorsal columns is None or missing.
Value for sub-queensland04 at level 5 in lateral funiculi is None or missing.
Value for sub-queensland04 at level 5 in ventral funiculi is None or missing.
Value for sub-fslAchieva01 at level 5 in spinal cord is None or missing.
Value for sub-fslAchieva01 at level 5 in white matter is None or missing.
Value for sub-fslAchieva01 at level 5 in gray matter is None or missing.
Value for sub-fslAchieva01 at level 5 in dorsal columns is None or missing.
Value for sub-fslAchieva01 at level 5 in lateral funiculi is None or missing.
Value for sub-fslAchieva01 at level 5 in ventral funiculi is None or missing.
Value for sub-milan01 at level 5 in spinal cord is None or missing.
Value for sub-milan01 at level 5 in white matter is None or missing.
Value for sub-milan01 at level 5 in gray matter is None or missing.
Value for sub-milan01 at level 5 in dorsal columns is None or missing.
Value for sub-milan01 at level 5 in lateral funiculi is None or missing.
Value for sub-milan01 at level 5 in ventral funiculi is None or missing.

TODO - check where is problem