Help. Overplapping prim wackiness

I have been working on a little project now and I am very pleased with it, but I have one trouble that has me pulling my hair out. I am trying to build with as few prims as possible so rather than using 4 individual prims to form the walls and ceiling in one section I used a hollowed out box. Where this section meets a round section no matter how I adjust the floor (round over, round under, round not touching the box, round thicker than the box, etc...) the round section seems to go phantom and I fall through right at the seam between the two prims. What is wierder is that the problem comes and goes. It wasn't there during construction, but it appeared as I was finishing up. Now it won't be there in a fresh copy, or when I modify the round floor, but as soon as I think I have it fixed I wasl back and forth a few times and whammo, I fall through. This area serves as a roof deck and the exact same set up below (walking inside the hollow cube onto a round floor) gives me know grief at all (knock prim).

What can I do to correct this? What casues it???





This second picture illustrates the only fix I have been able to find that seems to last, but for half of the round floor I look like that. Better than falling through but not good enough.

The round section is question is the root prim at the moment. Could changing that help in any way?

Thanks for anyone that can help. I have been fighting with this foolishness for 2 days!

Nimue, is this skybox next to or close to the sim's edge? That could explain the phantom prims...

No, but I did think about the problem being related to the location rather than the build. The problem reproduces though in different locations and at different altitudes.

Hmm.....it does hang between a couple of my parcels. I'll try it again all on one just to check again, but it is a frustrating problem becasue it won't happen and then half an hour later it will. Once it starts though it never magically gets better.

You could have a corrupted prim. Try copying the round prim; delete the copy; relink.

Thanks Calveen. Turns out the problem was not one of construction, but an unexpected side effect of a script. All fixed now. Thanks for your help.