Dear FreeSurfer experts

I am trying to extract the label using standard aparc.annot and will be using mri_mergelabels to create my own lobes to do GLM fit later on for ROI analysis.
However, it shows me the error like this when I check there are the files aparc.annot and the file from surf folder.
[toibigi2007@localhost OASIS_Data]$ mri_annotation2label --subject OASIS_0002_MR1 --hemi lh --outdir $SUBJECTS_DIR/OASIS_0002_MR1/label
subject = OASIS_0002_MR1
annotation = aparc
hemi = lh
outdir = /media/3B110EAE3B9DE8E0/OASIS_Data/OASIS_0002_MR1/label
surface   = white

ERROR: creating directory /media/3B110EAE3B9DE8E0/OASIS_Data/OASIS_0002_MR1/label
No such file or directory

One more question is that it says default is "white" surface, but I want to measure the cortical thickness.  Can I leave white in like this or do I change into --surf to gray for this?

Thank you and best regards,
--v-- Peace --v--
Duy Nguyễn 
Biomedical Engineering Department- IU HCMC
Cell: (+84)909999056
Email: duy.nguyenbme@gmail.com