Hi - I am attempting to run Qdec on a group of patients vs controls. I have 
created the mydata.table.dat file with fsid, Group, Age, Gender (and separate 
files for Group.levels and Gender.levels.


Everything is loading fine but when I press 'analyze' I get an error:


Completed creation of aseg and aparc stats data tables.

ERROR: QdecGlmDesign::Create: zero factors!


Can someone help me find out what I am doing wrong?


Many thanks in advance.


ps I am using the following version: freesurfer-Darwin-lion-stable-pub-v5.3.0


BW


Clare
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