afni.nimh.nih.gov

I can't tell from your description what is going on. Please send me your datasets: the ones used as input to the 3dfractionize command and the output mask, and the stim_47_BN1+orig input to 3dmaskave. Package these up as described in the "Upload" link (on the main message board page), and send them to me. I'll try running it myself to see what the issue is.

bob cox