dcm2nii error - Permission denied

 Hi,

I wanted to run dcm2nii on my raw dicom files. unfortunately, matlab says "converting Functional Images:Sub_026 OK/bin/bash: ./dcm2nii_mac: Permission denied" and doesn't transfer the dicoms into .nii format. I already used the terminal (mac) trying to solve the issue with "chmod u+x ./dcm2nii_mac". This didn't help.

Any ideas what might be the issue here?