I need to know what the program is looking for when it executes this line. Basically, I'm getting this message:

Error in startup script: can't find package Tk 8.0

while executing

"package require Tk 8.0"

Now this is for a particular user and if I run the program in my environment it runs, however, trying it under his environment doesn't. He obviously changed something in his startup script and I have attempted to point his $LD_LIBRARY_PATH to what I thought would be the right places but it still doesn't work. Anyways, I need to know what file or library is being sought so that I can track it down and update his startup script to point to the right location. Thanks!

Ok apparently, this was an indication of a borked session, so the only fix was to refresh his environment.