Hi again everyone.

I am using freesurfer 7.4.1. on ubuntu 22 with a virtual machine. I performed my first recon-all, without hard failures as the .log ended with "recon-all completed with no errors". Then, I have tried to launch freeview to visualize both volumes and surfaces for my subject, with the following command:

freeview -v angcher.02.04.91.12.09.22/mri/T1.mgz angcher.02.04.91.12.09.22/mri/wm.mgz angcher.02.04.91.12.09.22/mri/brainmask.mgz angcher.02.04.91.12.09.22/mri/aseg.mgz:colormap=lut:opacity=0.2 -f angcher.02.04.91.12.09.22/surf/lh.white:edgecolor=blue angcher.02.04.91.12.09.22/surf/lh.pial:edgecolor=red angcher.02.04.91.12.09.22/surf/rh.white:edgecolor=blue angcher.02.04.91.12.09.22/surf/rh.pial:edgecolor=red

but in freeview, surfaces are completely misaligned with volumes. This is an image to give you an idea of the problem (sorry for the quality, i'm controlling the computer on which i work remotely from home):

this is what i see in the terminal after launching the command:
Warning: MatrixInverse failed.
Did not find any volume info
Warning: MatrixInverse failed.
Did not find any volume info
Warning: MatrixInverse failed.
Did not find any volume info
Warning: MatrixInverse failed.
Did not find any volume info

when i first tried freeview after downloading the program, i had the same problem with bert; when i launch this command:

freeview -v $SUBJECTS_DIR/bert/mri/brainmask.mgz -v $SUBJECTS_DIR/bert/mri/aseg.mgz:colormap=lut:opacity=0.2 -f $SUBJECTS_DIR/bert/surf/lh.white:edgecolor=yellow -f $SUBJECTS_DIR/bert/surf/rh.white:edgecolor=yellow -f $SUBJECTS_DIR/bert/surf/lh.pial:annot=aparc:edgecolor=red -f $SUBJECTS_DIR/bert/surf/rh.pial:annot=aparc:edgecolor=red

this is what I get:

again, this is what I see in the terminal:

Warning: MatrixInverse failed.
Did not find any volume info
Warning: MatrixInverse failed.
Did not find any volume info
Warning: MatrixInverse failed.
Did not find any volume info
Warning: MatrixInverse failed.
Did not find any volume info

The only time when i didn't experience this problem is after downloading tutorial data and trying this command:

freeview -v good_output/mri/T1.mgz good_output/mri/wm.mgz good_output/mri/brainmask.mgz good_output/mri/aseg.mgz:colormap=lut:opacity=0.2 -f good_output/surf/lh.white:edgecolor=blue good_output/surf/lh.pial:edgecolor=red good_output/surf/rh.white:edgecolor=blue good_output/surf/rh.pial:edgecolor=red

that gave me this outoput in freeview:

but still I get this in the terminal:

any ideas on how could I fix this problem? many thanks in advance.