Hi Flora, we always use a Mac. Have run the analysis successfully on several different macs with different data sets (all produced in the same fashion though, and all from the same study). Ran the command again with debug on as you requested. The files in Step 1 are : finalMVN.nii.gz info.txt mean_delttiss.nii.gz paramnames.txt zstat_delttiss.nii.gz freeEnergy.nii.gz logfile mean_ftiss.nii.gz uname.txt zstat_ftiss.nii.gz and step 2: info.txt logfile uname.txt Hope this helps figure it out. Paul. ######################################################################## To unsubscribe from the FSL list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1