Question on creating multiple faces at once

Hello,
I am using Sketchup Pro and have imported autocad lines for building outlines. There are very many of these and would like to create faces all at once instead of individually. Is there a way to do this? I have chosen all the outlines and go to “tools” and “create faces” but that only works if I do one at a time.
Thanks.

There are extensions that can do this. One of them is Make Face from S4U.

MakeFaces v.1.400 … SketchUp Plugin by Todd BurchSmustard.com the Companion to SketchUp