[Freesurfer] unpacksdcmdir error for resting state fMRI

Hi all, I am following the FsFast tutorial ( https://surfer.nmr.mgh.harvard.edu/fswiki/FsFastFunctionalConnectivityWalkth...) for resting state data and I am stuck at the unpacksdcmdir step.

When I try and run the command I get an error that says "ERROR: Run ## does not exist in session." I've tried several different combinations of numbers that I thought might be the run ## but I haven't had any success.

All the data I am using are in .IMA format, not .dcm (ex. 000001.IMA 000002.IMA 000003.IMA...000140.IMA), so I am unfamiliar with how to find the scan acquisition number.

Thanks for the help!

P.S. Are there any good video tutorial's out there for resting state data? I have never done any fMRI analysis until now.