I’m working on a big model. When i try to creat new walls, with the rectangle tool, and push/pull, i get strange triangular shapes, instead of a completely filled in rectangle.
It helps if you post an image of what you see.
uh… how do i attach a screen shot to the message?
I think I’ve seen this in some rare cases. Are you tracing a DWG file? Maybe SketchUp can’t make up its mind wether the ednpoints are planar or not.
Showing hidden geometry (View > Hidden Geometry) may help to see all edges.
Saving the model starts the validity check which might also show some relevant information.
That is a total mess of hidden edges 
. I’d delete all of it and start over tracing.
i thought i did delete everything, and start over more than once. Maybe the hidden lines dont erase if they’re still hidden…? What happened, so i can avoid this…?
Select tool ignores hidden geometry unless its displayed. I usually show hidden geometry while working to avoid problems with it.
ok! thank you, you’ve helped alot!
your welcome 
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