Good afternoon,

I’m trying to run “tkregister2” in the following code for a manual registration correction:

tkregister2 --mov ./fMRI_run1.nii.gz --reg ./Reg.lta --surfs --sd ${SubjectsFolder}

The above command works fine in older versions of FreeSurfer, but with the new version that I have, I’m getting the following error:

Tcl_Init failed: Can't find a usable init.tcl in the following directories:

/usr/pubsw/packages/tcltktixblt/current/lib/tcl8.4

This probably means that Tcl wasn't installed properly.

I get the same error with "tkregisterfv". Here’s more info about my system, in case it helps. OS: Linux Ubuntu 18, FreeSurfer version: freesurfer-linux-ubuntu18_x86_64-7.4.1-20230614-7eb8460, Python version: Python 3.11.4, FSL version: 6.0.7.1

Please let me know if there's a known solution for this issue.

Thank you,

Negin