Dear FS experts: 
I am using aparcstats2table command to generate mean thickness of group subjects. 

my commands: 
aparcstats2table --subjects 10002 10003 10004 --hemi lh --meas thickness --tablefile aparc_stats_LH.txt

10002, 10003, 10004 are subjects. 

However, there were error message as:

"File "/usr/local/freesurfer/bin/aparcstats2table", line 156
    print 'ERROR: atleast 1 subject must be provided'
                                                    ^
SyntaxError: Missing parentheses in call to 'print'"

Would you pls give me some suggestions about that error?

Thank you very much!
Lawrence
Emory University