[Freesurfer] qdec.table.dat

Hi,

I am trying to run qdec for group analysis of subcortical and cortical volumes. I have all of my data in an excel sheet (subject ID, age, gender, volumes of various structures) and am trying to convert this into a file that will be able to be opened in qdec. I use a Mac, and I have exported the sheet into text-edit and then resaved it as "qdec.table.dat". This .dat file opens perfectly in text-edit. However, when I go to load the table into qdec it gives me an error: "error loading the data table"

Is the dat file I created not compatible with qdec? If so, is there another way in which I can transfer my data into a dat file?

Thank you very much in advance for your help,

Matt