OS: Windows 7, 64 bit
Graphic Card: NVidia Geforce 310M
Broken: 2.77a abf6f08
**Short description of error**
Many times , blender quits suddenly, without any error message.
at Last time blender quit and I can not open or recover my project file
my project was big and complex and uses most blender features and engines.
Important thing: I use OPENGL in many places in my project and final rendering.
Really I lost 7 days of my hard work