I was unclear. I was not suggesting for a lisp to turn on all layers. I was suggesting a lisp that would MAKE the specific necessary layers that need to be on. If different departments have different layers that needed to be added, then a separate lisp for each department could be made.
The code for a single layer is very simple:
(command "-LAYER" "M" "A-Heavy" "C" "250" "" "")
That line of code will make a layer called "A-Heavy" with a color of 250. Whatever other per layer variables are needed can be added as well. Do a similar line of code for each layer necessary. Turn all the individual layer lines into a single function definition per department so a drafter can enter the command to add the layers or make it automatically run by having individual department drafters add the lisp to their startup suite so the necessary layers would automatically be made in each drawing they opened. It would be immune to someone else purging the layers as they would just be added the next time someone opened the file.
