I noticed that SolidWorks crush for easiest using. I will cite two examples which SolidWorks 2014 crush with me.
I make tube using weldment, when I change the unit of load in simulation, SolidWorks will crush.
The same case happened when I tried to open old CAD version of SolidWorks 2009.
when I tried to edit definition shell in solidworks simulation SolidWorks will crush.