Hi Xiaozhen,

Sorry for the misunderstanding, the original script that I sent you (in order to modify the SPM.mat files to make all conditions session-specific) was meant to be run just once, not as part of your batch scripts. Running it multiple times ended up creating all of those strange-looking _Session1_Session1_Session1_... condition names (also it would seem that the script was run different number of times for different subjects so your project ends up having different condition names across different subjects which results in the error message that you get). In any way, in your script simply change the lines that read:

  load(spmfile_i,'SPM');
  for nses=1:length(SPM.Sess),
    for ncondition=1:length(SPM.Sess(nses).U),
      SPM.Sess(nses).U(ncondition).name{1}=[SPM.Sess(nses).U(ncondition).name{1}, sprintf('_Session%d',nses)];
    end
  end
  save(spmfile_i,'SPM');

to:

  load(spmfile_i,'SPM');
  for nses=1:length(SPM.Sess),
    for ncondition=1:length(SPM.Sess(nses).U),
      strappend = sprintf('_Session%d',nses);
      newname = [regexprep(SPM.Sess(nses).U(ncondition).name{1},sprintf('(%s)*$',strappend),'') strappend];
      SPM.Sess(nses).U(ncondition).name{1}=newname;    end
  end
  save(spmfile_i,'SPM');

This can be safely run as part of your script (it will remove the unnecessary/problematic "_Session1" strings from your condition names and it will not append additional "_Session1" strings to your condition names if run multiple times)

Hope this helps
Alfonso

Originally posted by Xiaozhen You: