Hi, when trying to run featquery I get the following message in report.txt Error - mask size doesn't match any of the images in the FEAT directory As a check I took the mask.hdr from the feat-directory itself. That should definitely have the correct image size, right? But I still get the same error message. I also checked the headers for the dim1-3 which all matched. Are there any other constraints for the mask image size that I am not aware of? Is there a min/max number of voxels in the mask? Thanks, Kerstin. -- WW /__\ | oo | _WWWWW_ (|_()_|) / o o \ \__/ (| __O__ |) /|\/|\ \ \___/ / |||||||| /-------\ |||||||| |=========| |||||||| |=========| ################################# Life is too short: CARPE DIEM Kerstin Preuschoff 139-74 California Institute of Technology Pasadena, CA 91125