This is exactly what I do:
1) I run uber_subject.py
2) In Analysis Initialization, I choose resting state and apply the changes
3) Since I don't have any anatomical dataset (I just have 141 .nii files for each subject), I uncheck Anatomical Dataset
4) In EPI Datasets section, I load all .nii files
5) Then I generate the cods and run them.
Then I get several warnings and this error in the end:
[7m** FATAL ERROR:[0m Can't use dataset with < 15 time points per voxel!
** Program compile date = Dec 31 2016
Because of this error I guessed that there I should gather all my .nii files in a single .nii.gz file.