Hey Greg,

So I fixed the reference brain issue but some brains register and others are still stalling at the first affine step. For instance I have two stacks from the same experiment with the same properties, the first one (shank3abCTH24_01; shank3abCTH24_02) registered fine but the second (shank3abCTH25_01;shank3abCTH25_02) stalled. I cannot figure out the difference.

Thanks,
Rob