Hi Ettore! At least if you just updated to the newest version I fear this is a Matlab version issue. Or do you use ML >2014a?
In any case, you can always check coregistration somewhere else (I like 3D Slicer for it).
The files to check would be rpostop_ct.nii and anat_t1.nii or anat_t2.nii (the one you used or either one if used both)
If check normalization also fails, you should compare the glanat* files to the /templates/mni_hires*.nii series (which are the 2009b NLIN asym templates).
Hope this helps and best regards to Fribourg!