Changing wall trashes ceiling lights

[roy.70844]

Hey there...

Has anybody experienced the following..
I have a simple(ish) building with 4 levels shaped like an L, the core (lifts, stairs WCs etc) at the intersection. I have suspended ceilingsin the wings. Here's the problem...
If I edit any of the the external walls the ceiling fitted lights seem to mirror themselves about a 45 degree axis and therefore land outside the ceiling and therefore want to erase themselves. By edit I mean just change from say 250mm thick to 300mm thick.

The ceilings have been drawn with sketch lines not pick walls.

Any ideas?????

TIA

Roy

[sbrown]

try pinning the lights before changing the wall. Lights move with the surface pattern of the ceiling unless they are pinned.

[roy.70844]

Thanks Scott,

I didn't think of that one. In the end I cut the lights to the clipboard, changed the wall then paste aligned to same place.

I still dot undersand what causes the rotate or mirror as shown in the creen shots

TA

Roy