Quote - Whats a bigmem switch?  Maybe thats my problem .... ! How do you set it

It's a setting that should be compiled into the application.  Pretty sure this is now built into Poser 8, it was built into Poser 7.  I doubt this is what's making you crash.  One thing you might try is making bucket size larger (odd as that sounds).  Just to test, see if you can render the same scene with a large bucket size and very small resolution (100x100) - obviously you won't want to do your renders at 100x100 resolution, but see if your problem still happens with smaller resolution, if it does then maybe you can find some combination between bucket size and render resolution that works.

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