Today i had such error after update CREO from M070 to M120 on CAD Worker and users PCs.
The problem is in pvsthumb.exe (version mismatch). To solve this problem i think PTC will recomend update windchill.
But i solve this problem by replacing pvsthumb.exe and modify pvsthumb.bom (probably it may be not necessary)
1) Copy pvsthumb.exe from ...\Creo 2.0\Common Files\M120\apps\prodview\bin (143 kB)
2) Copy pvsthumb.exe from ...\Creo 2.0\Common Files\M120\apps\prodview\x86e_win64\obj (2002 kB)
Сreate backup windchill server:
...\Windchill\wvs\x86e_win64\obj\pvsthumb.exe
...\Windchill\wvs\bin\pvsthumb.exe
...\Windchill\wvs\bom\x86e_win64\pvsthumb.bom
Replace ...\Windchill\wvs\x86e_win64\obj\pvsthumb.exe by ...\Creo 2.0\Common Files\M120\apps\prodview\x86e_win64\obj\pvsthumb.exe
Replace ...\Windchill\wvs\bin\pvsthumb.exe by ...\Creo 2.0\Common Files\M120\apps\prodview\bin\pvsthumb.exe
modify pvsthumb.bom
p pvsthumb.bom
i -1.-1
b 13.2.20.23
e x86e_win64/obj/pvsthumb.exe
s bin/pvsthumb.exe
P