**System Information**
Windows 7 Ultimate
Intel Core i7-4770K at 3.50GHz
16GB RAM
EVGA NVIDIA GTX TITAN
**Blender Version**
Broken: 2.72 9e963ae
Worked: (optional)
**Short description of error**
Error thrown when "Checking all" in the 3d Printing tab with 3d Print toolbox addon enabled
**Exact steps for others to reproduce the error**
Enable 3d-print tool box in addons.
Go to "3D Printing" tab
Select object
Click "Check All"
Error thrown
{F124541}