i got this error when i try to build it
warning W073: removed block 447 - plane too narrow
and before it start to build it worm me that there are untexture block, which i have texture all the block.
anyone know what is the problem?

block 447 is one of my room floor.
i even got this kind of problem when i put light that under prefab into my level.

if i dont bother about the error, after build i run it, the level have no texture on. furniture not in and stair is not at the position i put.

Maybe this helps on the manual
WARNING W072: Block x - plane x too narrow!
Block x is too narrow. Use Object>Find Block and make it bigger. Often followed by Warning W075.

I had that problem very recently and it turned out to be a sliver (very small block) that was left over after I used CSG Subtract to cut a curved window. The sliver was in a group.

Try selecting the block and see if it is grouped. Ungroup and see if there are any small pieces.

You shouldnt use cgs subtract. There are times when you could use it but 90% the time the time you shouldnt. Even the 10% you could Id still suggest not using it.

As you noticed it creates weird outcomes.Also can greatly increase build times as well as leave artifacts around the areas in which you used them.

Its been brought up around here quite a few times. Its better to just use edge and vertex move mode to build doors,windows ect... If your unsure what I mean I have a short video on my site that builds an arch with out using cgs subtract.

As far as the blocks being untextured theres probally a face or something that isnt.

I suggest after building a level and about to texture it assign a texture to the entire level and set its flag to none. THen you can go thru and texture what needs to be textured. Any of the blocks set to none will not be rendered which can increase build times and up Fps while the game is running.

Personally I created a hot pink texture which I use for such a thing. Its easily noticed during the texturing stage so you can tell if you missed a block.

now i got another error when i try to build
--Invalid blocks detected- recompliling with HiPrec--

by the way y after i texture everything in my level but it still say some untexture block, and when i run the my level, there is no furniture and the all the block in the level are untexture?