[Freesurfer] wrong values for volume

Dear Freesurfer Users

I did the whole group analysis process, but unfortunately the measure for volume didn't work correctly. I think the problem is, that i couldn't create the "source-files" (the ?h.volume files in the /subject/surf folders) like for the other measures. I did that with a command in matlab, which Bruce Fischl recommended me. When i try to look at the results with the tksurfer the whole hemisphere is yellow and the values for the sig.mgh overlay are all 10000000000. Has somebody an idea how to create the volume measure otherwise, or what went wrong? Thanks for every help in advance.

Best regards, Rafael Huber