I use SprinkCAD fire sprinkler design software, and one of the commands puts polylines on all the sprinkler pipe between sprinklers. Unfortunately, the program that does that is over twenty years old, and so it creates old style 2D polylines. This has caused issues with file stability in the past, as well as those polylines can't be selected to turn off layers, making them very useless. I want to write a LISP program to convert all the 2D polylines to LW polylines as soon as the old program is complete. However, CONVERTPOLY requires selection with the mouse. Is there are way to force the command to select all?
UPDATE: I've solved this. Turns out the CONVERT command includes a select all option for polylines.
