There is a researcher here who is getting this error in version 4.2.0, I have uploaded the 001.mgz to the ftp:
****************TEMPLATE DEFORMATION****************
second estimation of the COG coord: x=150,y=117, z=145, r=8362 iterations GLOBAL CSF_MIN=1, CSF_intensity=2, CSF_MAX=4 , nb = -1073730580 RIGHT_CER CSF_MIN=1, CSF_intensity=2, CSF_MAX=20 , nb = -1073752625 LEFT_CER CSF_MIN=1, CSF_intensity=2, CSF_MAX=4 , nb = -1073753196 RIGHT_BRAIN CSF_MIN=0, CSF_intensity=5, CSF_MAX=26 , nb = -1601994905 LEFT_BRAIN CSF_MIN=1, CSF_intensity=2, CSF_MAX=9 , nb = -1073752746 OTHER CSF_MIN=1, CSF_intensity=2, CSF_MAX=4 , nb = -1768967209 mri_watershed Error: GLOBAL region of the brain empty ! Darwin lim44-macpro.local 9.6.0 Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/RELEASE_I386 i386
----------------------------------------------------------- Pedro Paulo de M. Oliveira Junior Diretor de Operações Netfilter & SpeedComm Telecom --- Novo Netfilter 3.0 www.netfilter.com.br