Do you have the appropriate video card driver installed for your version of Windows operating system, computer hardware and version of SolidWorks?
Give us more info on the complete specs of you computer.
Thank you for your reply.
Drivers installed are the latest: "311.35-quadro-tesla-win8-win7-winvista-64bit-international-whql"
PNY Nvidia Quadro 2000
Solidworks 2010 x64 SP5.
Windows 7 x64
Realview is off.
According to Solidworks, they tested 220.127.116.1157 with SW2010 under WinXP x64.
We are under Win 7.
My question was if someone had that problem even in that context that it's might not be 100% supported.
Install previous driver "307.83-quadro-tesla-win7-winvista-64bit-international-whql".
Beta and older drivers here: http://www.nvidia.com/Download/Find.aspx?lang=en-us
It appears the latest driver is not stable.