[Freesurfer] retinotopy and FsFast

Hi

Thanks for all your previous help with freesurfer.

I am trying to use FsFast to do retinotopy analysis and have been following the instructions at: https://surfer.nmr.mgh.harvard.edu/fswiki/FsFastIndividualRetinotopyAnalysis

I come undone at the stage of running the actual analysis, where the command should be:

sfa-sess -s avdk -a rtopy

what does 'avdk' refer to? when i run it i get: ERROR: could not find session avdk

when i try it with the arguments:

sfa-sess -analysis rtopy -sf sessid

which is similar to the arguments needed for 'selxavg-sess' i get a similar error of not been able to find my (particular subject's) session. i believe i have set up the all the directory structures etc correctly for the sessions format as previous steps worked fine.

any ideas what's going wrong?

thanks

Jane Aspell