I am trying to run this command using the last version of Freesurfer:

mris_convert --combinesurfs my-left-surface.mgz my-right-surface.mgz lh.rh.asc

But I receive this error:

No such file or directory
freadFloat: fread failed

The input data file are inside the root directory. I tried to put these files in several other folders but still it does not work.

Do you have any ideas in how can I combine my left and right surfaces?

thank you very much,

best regards,