Thanks, Doug,
By any means, does the following register.dat look incorrect?
subjid 3.800000 5.000000 0.150000 1.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 1.000000e+00 -1.525879e-05 0.000000e+00 -1.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00 1.000000e+00 round
Nam.