Designer Robert L. Zipprich sent us a tip to ensure the Purge command actually purges your unwanted AutoCAD objects.
"There appear to be some things the Purge command doesn't delete unless you add a modifier. The Command line entry –Purge + A (for All) deletes:
Objects that cannot be deleted without specifying a modifier are:
- regapps (use –Purge + R)
- zero-length geometry (use –Purge + Z)
- empty text objects (use –Purge + E)
In one drawing I found there were 84,383 registered applications deleted."
Notes from Cadalyst Tip Patrol: AutoCAD files can get cluttered with styles and other unused objects. This increases the size of the drawing's database and can slow down performance. That's where the Purge command comes in; it empties the file of unused content. It will get rid of unused layers, dimension styles, text styles, blocks, and more.
The tip here suggests entering the Purge command through the Command line. The dash (–) before the text Purge will start the command without a dialog box (you can do this with almost any command). Type –Purge on the Command line, then A to purge all the objects listed in the first bullet list above. But All won't purge everything. Why? I don't know. You have to enter R for registered applications, Z for zero-length objects, and E for empty text objects. If you run the Purge command with the dialog box, you can select a box to purge zero-length objects, but you'll still need to type in the modifiers to get the apps and empty text objects.