Hi,<br>     I used to run my mkanalysis-sess without indicating -per-run or -per-session, assuming that when I have pre-processed my files with -per-run flag then selxavg3-sess will do the same. But when I checked the <a href="http://analysis.info">analysis.info</a> I noticed  &quot;PerSession 1&quot; which I think it means system will use per-session preprocessing. So, this time I explicitly used -per-run in my mkanalysis-sess as below:<br>
<br>preproc-sess -s &lt;SubjId&gt; -per-run -fwhm 5 -fsd bold -fwhm 5 -surf self rhlh<br><br>mkanalysis-sess -analysis Reward.rh -surface self rh -native -fwhm 5 -paradigm Conds.par -event-related -polyfit 2 -gammafit 2.25 1.25 -mcextreg -TR 2.000 -nconditions 7 -refeventdur .10 -fsd bold -per-run -force
<br><br>    This time when I ran selxavg3-sess command I faced this error:<br><br>ERROR: cannot determine format of<br>/autofs/cluster/tootell/pitcairn/1/shahin/Reward/Subjects/limi1/bold/004/fmcpr.sm5<br>(MRIread)<br><br>
<br>Error in flac_customize (line 87)<br>mri = MRIread(fstem,1);<br><br>Error in fast_selxavg3 (line 65)<br>flac0 = flac_customize(flac0);<br> <br>&gt;&gt; ------------------------------------------<br>ERROR: fast_selxavg3() failed\n<br>
<br><br>As I checked my subjects directory I had these files in /bold/004/ directory:<br><br>fmcpr.nii.gz<br>fmcpr.sm5.self.rh.nii.gz<br>fmcpr.sm5.self.lh.nii.gz<br>
<br>Notably, if I drop that -per-run flag from my mkanalysis-sess then system works without any problem. But then I am not sure whether I have processed my data in per-run or per-session mode.<br><br>Any help will be appreciated<br>
Regards<br><br clear="all"><br>-- <br>Shahin Nasr<br><br>PhD in Cognitive Neuroscience<br>Martinos Imaging Center, MGH<br>Harvard Medical School<br>