I just downloaded OpenSim 3.3 for windows 64bits (I am on windows 10), tried to open my *.trc file in it, and got the error message:
Couldn't load data and/or model for display.
Possible reasons: data file has incorrect format or resource file _openSimlab.osim missing.
For information, at the end of the installation, I had a warning telling "Warning! PATH too long intaller unable to modify PATH!".
I found this post concerning a similar issue: https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=91&t=3967&hilit=previewing+trc+file
So I added the variable "OPENSIM_HOME" with the value "C:\OpenSim 3.3\"
I also added "C:\OpenSim 3.3\" in the Path variable...
But I have still the issue.
Thank you in advance for your help