I'm attempting to run second-level analysis on separate runs of a brain scan, that were generated by selxavg3-sess -run-wise (pr001, pr002, pr003, pr004) as described in selxavg3-sess --help.

But, when attempting to concatenate the data using isxconcat-sess, (as described here: https://surfer.nmr.mgh.harvard.edu/fswiki/FsFastTutorialV5.1/FsFastGroupLevel ) there is no similar -run-wise function. I've searched the list and no similar errors have been reported.. I am wondering if there is a command or workaround for this. Thank you very much!

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