Solidworks is really not my field, but I'm trying to troubleshoot an issue that someone is having with their SolidWorks, so I'll try to explain what is going on.
First off, the product is SolidWorks '09, SP2.1.
Here's the issue: When viewing a large assembly, some of the parts are "invisible" if the assembly is not moving. If he zooms or rotates the assembly, the parts become visible duing the operation, but once he stops moving the assembly, the parts disappears again ... If he zooms *way* in, the parts becomes visible, even if the assembly is still.
Now, this is one of the brightest guys I know, there's no way he would have set a "hide part" flag on these parts (if there is such a thing, and he would have checked if this was set himself...). Plus, if a part was hidden in such a manner, it should not exhibit the behavior that it does during rotation/move/zoom ...
Other useful information (maybe)
OS: Windows XP SP2 (x86)
Hardware: HP XW4400 Workstation, ATI V7200 video card, dual monitors.