[Freesurfer] LGI longitudinal data

Hi,

Is it possible to run the LGI on data that has already been longitudinally processed?

For example, when I try to run:

recon-all -s subject001.long.subject001_base -localGI

I get the following error:

ERROR: Are you trying to run or re-run a longitudinal time point?        If so, please specify the following parameters:

' -long <tpNid> <templateid> '

where <tpNid> is the time point id (SAME as cross sectional        ID) and <templateid> is the ID created in the -base run.        The directory <tpNid>.long.<templateid> will be created        automatically or used for output, if it already exists.

This is using v5.1.0, and no, I'm not trying to re-run a longitudinal time point.  Just the LGI. I'd appreciate any suggestions!

Thanks so much, Tricia