[Freesurfer] mri_ca_normalize infinite loop

Hi, I have one subject which seems to cause mri_ca_normalize to hang. I've checked and the registration to tal is okay, as is the brainmask. The subject in question does have large ventricles and lots of atrophy, which is what I'm assuming is causing the problem.

Here are the last couple lines:

finding control points in Left_Cerebral_White_Matter.... found 41584 control points for structure... bounding box (132, 66, 29) --> (194, 169, 199)

and then it will just hang there with no errors or further screen output. I let it run for almost 24 hours (others took only 7) and I've tried on a couple different machines with no luck.

any ideas on how to debug?

thanks, mishkin

freesurfer-Linux-centos4_x86_64-stable-pub-v4.1.0