Intersect With Model Problem

[Stu]

Hi Guys,
For some reason I am having a problem with the 'Intersect With Model' command.
I am using the free version of SU 7 and until recently it worked fine....its a command I use frequently and is essential in my work flow.
Im finding a reasonably complex intersection just hangs the model and even a simple intersection of a couple of planes takes ages.
I cant really figure what's happening....a video card playing up?.....a RAM problem?.......I havent noticed any other problems with my computer.
Any suggestions appreciated

[TIG]

Don't try to select everything and intersect it with everything else - it takes ages... although it might finish eventually...
If you have some faces that you know need to be intersected, then select only those and use intersect with context/model... the intersecting should then be much swifter...

[Stu]

Thanks Tig,

Partial selecting would certainly help...but it does seem like a recent problem....Ive been using this function constantly since it was first introduced way back in version? without much trouble.