I tried to use FreeSurfer version 6.0.0 to process fifteen subjects, but half of the subjects was stuck at the ¡®Correcting Defect¡¯ step. However, when I changed to FreeSurfer version 5.3.0, the ¡®Correcting defect¡¯ step finished successfully. Is it possibility that the unsuccessful ¡®Correcting Defect¡¯ step is caused by the different versions of Freesurefer?

In addition, when I added the flag -parallel -openmp 30 based on the version 6.0.0, the recon-all ¨Call runtime still need 20+ hours. It seems that the parallel processing did not reduce the processing time. I wonder why the parallel processing did¡¯t save time?

Any help would be greatly appreciated.