System Information
Operating system and graphics card
Windows 7
Intel HD Graphics
Blender Version
Broken: (example: 2.69.7 4b206af, see splash screen) 2.77a
Worked: (optional)
Short description of error
basically the animation bone selection tool is not able to activate it, when you try it brings up some python code
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps
user preferences
add-on
click on the Animation Bone Selection Group