Dear freesurfers,
I am coming across an error in the beginning of make_average_volume of make_average_subject where mri_convert fails. make_average_surface finished without a problem so hopefully that part will not need to be re-run. I've check permissions, cpu space, paths but couldn't find anything... Any help/suggestions would greatly appreciated. Below is the error message:

INFO: Applying transformation from file /study/NCCAM/Data/MRI/processed/structural/freesurfer//WB101_1//mri/transforms/talairach.xfm...
---------------------------------
INFO: Transform Matrix (linear_ras_to_ras)
 1.156   0.062   0.028  -2.110;
-0.102   1.113   0.318  -31.524;
-0.029  -0.322   1.218   4.598;
 0.000   0.000   0.000   1.000;
INFO: Transform dst volume info is not used (valid flag = 0).
INFO: assumes that the dst volume given is the same as the dst for the transform
mghWrite(/study/NCCAM/Data/MRI/processed/structural/freesurfer//average/tmp/make_average_vol-tmp-2117/orig-WB101_1/.mgh, -1): could not open file
---------------------------------
Applying LTAtransformInterp (resample_type 1)
writing to /study/NCCAM/Data/MRI/processed/structural/freesurfer//average/tmp/make_average_vol-tmp-2117/orig-WB101_1/.mgh...
ERROR: failure writing /study/NCCAM/Data/MRI/processed/structural/freesurfer//average/tmp/make_average_vol-tmp-2117/orig-WB101_1/.mgh
/study2/NCCAM/Data/MRI/processed/structural/freesurfer
ERROR: mri_convert failed.

Many thanks in advance,
Martina