Dear Freesurfers,

So I have followed all the instructions given on your website in order to use qdec. When i analyse the images only using a file group.levels that defines the two groups I'm comparing the analysis runs fine and gives me results, but when I add gender, for instance, as a discrete factor, it loads the data successfully but when I click analyse it shows the following error:

Error in Analyze: Couldn't open file /tallaght-disk4/IMAGEN/Saloni_data/freesurfer_output/000072882642/surf/lh.thickness.fwhm10.fsaverage.mgh

Please guide me as to what is going wrong and what I can do to fix it. I would appreciate a quick response as my thesis submission is due in two weeks and I cannot proceed until this problem is sorted.

Thanks and regards,

Saloni