Hello,
I have downloaded v0.18 today and I've couldnt access BOLTS and Drawing Dimensioning.
Thinking it may have had something to do with with having ver 0.17 so I uninstalled it, also installing\update and uninstalling those multiple times.
still get a red message that disappears about "traceback"
Note for BOLTS I have followed the installation instructions that were on github
OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16110 (Git)
Build type: Release
Branch: (HEAD detached at upstream/releases/FreeCAD-0-18)
Hash: f7dccfaa909e5b9da26bf50c4a22ccca9bb10c40
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)