[Freesurfer] Recon-all -hires

Dear all,

I have T1 images collected from the 7T MRI scanner.

I downloaded the most recent freesurfer software, and followed all instructions to install the software before using it.

I would like to segment the T1 data using its high resolution image, and also to segment the hippocampal subfields.

For command, I use this:

recon-all -all -s <subject name> -hires -i <subject dicom T1 image frame 1 location>

However, I get an error message:

cannot find $FREESURFER_HOME/average/RB_all_2008-03-26.gca

I'm not sure what I did wrong.

Also, how can I combine high resolution segmentation and hippocampal subfields segmentation?

Could someone please help?

Thanks.

Best regards, Hweeling