Most of my office uses vanilla AutoCAD to produce electrical engineering documents. This is fine most of the time for when we receive documents from the architect in 2d format. But sometimes it starts to act funny when we get 3D walls and doors to work with.
At first I tried to explode all of the AEC blocks in order to break them down to 2D objects to make them easier to work. This usually required a bunch of steps of exploding a block and then deleting some and exploding more blocks to get down to the lines that are found at a Z=0 level. The trick was to isolate only the AEC objects and explode them. You didn't want to explode the normal 2D blocks.
If you don’t want to explode other blocks or try to find all the AEC objects, you can use this handy command to just convert the AEC objects to autocad objects.
-AECTOACAD This command creates another file with all of the AEC objects converted to autocad objects and flattened. It is a lot smaller that exploding everything in the drawing.
I choose the prefix option from the drop down menu and AutoCAD prefixes the new file with a ACAD-. Then hit "F" for filename and autocad will show you the path and the new filename for the drawing it will create. It defaults to the same directory of the file you are working on. This makes it easy to find your converted file when you are done.