Hi Freesurfer team,

I am planning on following this page for my longitudinal group analysis using QDEC: http://www.freesurfer.net/fswiki/FsTutorial/QdecGroupAnalysis_freeview. However, it tells me to run -qcache for all of my subjects. Since I already ran the -long stream for all my subjects, do I need to rerun them all adding the -qcache command? 

Also, I have also run the long_mris_slopes on all of my subjects, which produced smoothed thickness files for all of my subjects (which are all in the ''base'' files). Does these files are okay for my QDEC analysis, or I really need to run all of my subjects all over again adding -qcache?

Thank you very much,