Hi, Ian-
The output text suggests that the overlap of the two datasets is poor to start with. We can check that visually---what is the output of this:
@djunct_overlap_check \
-ulay AP1009B_anat_ns+orig \
-olay MNI_avg152T1+tlrc
... which might produce 2 images, if either of the ulay/olay contains obliquity in the header.
Also, can I ask the context that this is being run in? Is this part of an FMRI processing pipeline?
thanks,
pt