We just updated to 2016 sp5 and now our GTOL.SYM is not quite right.
I renamed GTOL97.sym to GTOL.sym and pointed the file location to the renamed file, then restarted SW.
When I opened up a drawing and clicked a dimension, I was able to add diameter symbols, centre-line symbols, etc. to my heart's content.
However, when I click the Geometric Tolerance button at the top of the screen and click the drop-down menu for Symbol, whichever symbol I select brings up the old warning:
Symbol library file (GTOL.SYM) is missing. etc.
My colleague has the same problem on his machine.
I'm stuck now.