Im not sure if its the problem or not, but seems that its the file permission error.

Either do "sudo su" and re-run your command as root or change the file permissions in /subjects folder.

Running commands as "root" is generally not recommended.

On Jul 15, 2016 4:41 PM, "Sherryse Corrow" sherryse.corrow@icloud.com wrote:

Hello freesurfer developers,

I installed FreeSurfer on my computer today using the instructions found here: https://surfer.nmr.mgh.harvard.edu/fswiki/DownloadAndInstall. After installation, I proceed to the “test your FreeSurfer Installation” section. Upon trying the first test, I ran the following and code and received the following error.

Sherryses-iMac:~ sherrysecorrow$ cd $FREESURFER_HOME/subjects Sherryses-iMac:subjects sherrysecorrow$ mri_convert sample-001.mgz sample-001.nii.gz mri_convert sample-001.mgz sample-001.nii.gz $Id: mri_convert.c,v 1.179.2.7 2012/09/05 21:55:16 mreuter Exp $ reading from sample-001.mgz... TR=7.25, TE=3.22, TI=600.00, flip angle=7.00 i_ras = (-0, -1, -0) j_ras = (-0, 0, -1) k_ras = (-1, 0, 0) writing to sample-001.nii.gz... niiWrite(): error opening file sample-001.nii.gz ERROR: failure writing sample-001.nii.gz

I’ve searched the list and was unable to find someone with the same error in the archives. Any thoughts on how to fix this?

freesurfer-Darwin-lion-stable-pub-v5.3.0 Mac OS X version 10.9.5

uname -a Darwin Sherryses-iMac.local 13.4.0 Darwin Kernel Version 13.4.0: Mon Jan 11 18:17:34 PST 2016; root:xnu-2422.115.15~1/RELEASE_X86_64 x86_64

Thanks, Sherryse

_______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.