Thanks, I did activate the autosave feature after I posted. It was bothering me by making Lightwave sluggish while I was trying to work. Not anymore! It's not Lightwave that is crashing, but Open GL as it tries to draw millions of polys in real time as I manipulate the mesh in 3D as I model. when I make too many clicks and movements too fast, the app crashes. I think I need more graphics memory than my current card ( and old EVGA GX2 with 1024mb) to handle manipulating the increasing number of polys on screen as my build progresses.
I should start to break up the mesh into much smaller modules by now as I intended, but I am just too lazy! Also, I like to see how the new greebles "look" against the background of the surrounding structure while working. It helps me to decide on the overall size and detail to add.
Well, it's been a nice 5 day holiday, back to work