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Hi Matthew, yes, the mask is binary. First I thresholded thresh_zstat to remove all negative values then I binarised the rest with fslmaths. I checked it and it seemed OK. Thanks for the message, George 2015-08-11 16:38 GMT+02:00 Matthew Webster <[log in to unmask]>: > Hello, > Is the mask binary? If not you may want to binarise to see if > that changes anything. > > Hope this helps > Matthew > > > Dear all, > > > > to follow up on the issue, the log file doesn't mention any error. The > program simply doesn't move on when it reaches 'Starting PCA' with no error > information. There is no problem when there's no masking involved. > > > > I tried a few different things, but unfortunately the same thing kept > happening. I used a different installation of FSL on another machine, but > the results were the same. I also tried to do the masking myself and > inputted already masked images without implementing the mask command in > melodic, but the result was also the same. > > > > The mask is that of a component already outputted by the analysis on the > same data. I am trying to find subcomponents of a specific component. It is > of course non-contiguous, so I don't know if this has anything to do with > it. > > > > The command that I implement is the following: > > > > melodic -i [name of input files separated by commas] -o Group_ICA -a > concat --tr=2 --Ostats --report --mmthresh=5 . > > > > I would really appreciate your help on this issue. Or if there's any > other possible way to get subcomponents of a component. > > > > Best regards, > > > > George >