Hi-

Well, just to be clear: those images show your *initial* datasets over the template (not the results after alignment).

The (likely) problem this reveals is one that relates to how 3dQwarp works to apply warps: it creates a mesh at the "base" dataset resolution that spans both the source and base dset FOVs, and then applies the warp. If the source and base are far apart (which is essentially what your images are showing), then that intermediate dset can be *huge* and lead to a crash. I believe that is what is happening here.

Can I send you a link for uploading your initial dsets so I could take a look?

--pt