Dear FS experts

I run a longitudinal analysis, and all steps (cross, base, long) were run
without errors. I used QA tools in order to look at the results and all
recons are fine.

However, when running glmfit with the --osgm option there is no error
message, but there is also no results (sig=0, F=0). In the log I realized
that the mask is empty (see below).

Found 149955 points in label.
Pruning voxels by thr: 0.000000
Found 0 voxels in mask
Saving mask to Cap_Thickness_LH.glmdir/mask.mgh
Reshaping mriglm->mask...
search space = 0.000000

What are the most plausible reasons for this empty mask?
Should I try the pruning option?

Thanks in advance
Regards
Jürgen



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Jürgen Hänggi, Ph.D.
Division Neuropsychology
Institute of Psychology
University of Zurich
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j.haenggi[at]psychologie.uzh.ch (email)
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