Hello,

This question might be most appropriate for the developers of GIFT for ICA analyses but thought I would check to see if anyone had any ideas about an issue that I am having.

I have been using intensity normalization as a processing step in GIFT. When GIFT is conducting this preprocessing step along with prinicipal components analysis, for one subject, I get the following error: Input to SVD must not contain NaN or Inf.

This subject was processed in afni prior to GIFT in the same way as all the other subjects. Also, this error did not happen when I used remove mean per timepoint as preprocessing step instead of intensity normalization.

Any ideas as to what could be going on? Here is my afni proc py script:

afni_proc.py \
-subj_id ${subject} \
-script proc_${subject}.ruminationinduction_ICA_blur6_MNI_2 \
-out_dir ${subfolder}/${subject}/${subject}.ruminationinduction_ICA_blur6_MNI_2 \
-dsets ${subfolder}/${subject}/p*/e*/${subject}_${study}_rum+orig.HEAD \
-copy_anat ${subfolder}/${subject}/p*/e*/${subject}.spgr+orig.HEAD \
-blocks despike tshift align tlrc volreg blur mask \
-tcat_remove_first_trs 7 \
-volreg_align_e2a \
-volreg_tlrc_warp \
-tlrc_base MNI_avg152T1+tlrc.HEAD \
-blur_size 6

Thanks,

Emily