Dear Freesurfers, 

Command line: make_average_subject --out average --subjects ... (n=60) 

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Applying LTAtransformInterp (resample_type 1)
writing to /Volumes/Macintosh/freesurfer/Kontrollen//average/tmp/make_average_vol-tmp-15056/orig-A2/WE.mgh...
ERROR: failure writing /Volumes/Macintosh/freesurfer/Kontrollen//average/tmp/make_average_vol-tmp-15056/orig-A2/WE.mgh
/Volumes/Macintosh/freesurfer/Kontrollen
ERROR: mri_convert failed.
ERROR: make_average_volume


Surface averaging was done without any problem, but the volume averaging ....

Any clue what's wrong?

Thanks in advance
Holger