Hi, After doing the retinotopy analysis I find I can't view the fieldsign with command surf-sess http://surfer.nmr.mgh.harvard.edu/fswiki/surf-sess -s sessid -a rtopy -retinotopy fieldsign -flat (I can view ecc/polar data though.) What is shown is a very dark patch almost invisible.

I read the entire thread in http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg07329.html I am using the latest build for Mac Intel. I could not find convert_fieldsign.m

Anybody can help?