A part of my project is not rotating

When I use the orbite, my walls (one componant) are not mooving.
My floor is.
Everything was working fine, but I don’t know what did I do, but it’s not moving anymore.

I just did ‘‘éclater (burst)’’ and now everything is back to normal. Anybody know why??

It’s hard to be sure without examining the skp file, but I suspect you somehow got “always face camera” set on the walls component. Exploding will eliminate this setting.