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Hi,
I run Freesurfer remotely on Ubuntu, and locally on my Mac, so I’ve not had this problem personally. Two students are working remotely with PCs and are using the VM installation you folks provided (https://surfer.nmr.mgh.harvard.edu/fswiki/rel7downloads). 

Both of the students report that the tk applications (tkmedit and I think also tksurfer) fail to launch. At the command line, they run the command, and nothing really happens.
One student provided a bit more information:
I don't know if this helps, but I ran tksurfer and actually got an error that read out, ' TCL_init failed: Cannot find a usable init.tcl.  This probably means that Tcl wasn't installed properly.  TK_init failed: invalid command name "tcl_find/library” ‘
Unfortunately I could not provide any help at all because when I attempt to run the VM on virtualbox on my mac, following the directions at https://surfer.nmr.mgh.harvard.edu/fswiki//VM_67_mac
The OS fails to boot, and I only see a series of messages about recovering a journaled filesystem before the VM halts.

Most of their learning has involved the CLI so it hasn’t been a huge impediment, but we’re about to run the GLM, and will require these resources to visualize.

Thanks,
Chris

/**********************************************
* Chris McNorgan
* Assistant Professor
* Department of Psychology
* University at Buffalo, 
* The State University of New York
* Office: 716.645.0236
* Lab: 716.645.0222
**********************************************/