my lisp stops when selection set = 0

I did try to search the forum before posting, but since I'm not even sure what I'm looking for I gave up on that. Ok, so I'm playing around with lisps. i have multiple setq lines that are using ssget to select items in various layers. The lisp works just fine when every layer that i use ssget has something in it. However, if a layer has no items then my lisp will stop working and just say "select objects". What do I need to do for the lisp to say to itself "ok, i am selecting 0 objects, lets move on" ? Thanks.

We are going to need to see the code

Either attach as a file or paste it inline, using [noparse]

[/noparse] tags, like this:

(defun foo ()
 (function)
)

don't laugh at it

(defun c:danger (/ byby delcab deltext deldiv delsplash delsqft deldims)
 (setq byby (ssget))
 (command "_.ERASE" "_All" "_Remove" byby "")
 (prin1)
 (command "-layer" "s" "0" "")
 (setq delcab (ssget "x" '((8 . "cab lines"))))
 (setq deltext (ssget "x" '((8 . "text"))))
 (setq deldiv (ssget "x" '((8 . "drawing divider"))))
 (setq delsplash (ssget "x" '((8 . "splash"))))
 (setq delsqft (ssget "x" '((8 . "sqft"))))
 (setq deldims (ssget "x" '((0 . "dimension"))))
 (command "_.ERASE" delcab deltext deldiv delsplash delsqft deldims "")
)

Maybe:

(defun c:danger (/ ss byby)
 (if (and (setq ss (ssget "x" '((8 . "cab lines,text,drawing divider,splash,sqft,dimension"))))
      (setq byby (ssget)))
   (progn
     (command "_.ERASE" "_All" "_Remove" byby "")
     (command "_.ERASE" ss""))
   (princ "\n<!> Nothing Found <!>"))
 (princ))
       

Try replacing this...

 (setq delcab (ssget "x" '((8 . "cab lines"))))
 (setq deltext (ssget "x" '((8 . "text"))))
 (setq deldiv (ssget "x" '((8 . "drawing divider"))))
 (setq delsplash (ssget "x" '((8 . "splash"))))
 (setq delsqft (ssget "x" '((8 . "sqft"))))
 (setq deldims (ssget "x" '((0 . "dimension"))))
 (command "_.ERASE" delcab deltext deldiv delsplash delsqft deldims "")

...with this

 (if
   (setq sset (ssget "_X" '((8 . "cab lines,text,drawing divider,splash,sqft,dimension"))))
   (command "._ERASE" sset "")
 )

If it is all dimension entities not a layer named dimension, then try this:

 [b][color=BLACK]([/color][/b]and
   [b][color=FUCHSIA]([/color][/b]setq ss
      [b][color=NAVY]([/color][/b]ssget [color=#2f4f4f]"X"[/color]
        [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons -4 [color=#2f4f4f]"<OR"[/color][b][color=GREEN])[/color][/b]
                [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"DIMENSION"[/color][b][color=GREEN])[/color][/b]
                [b][color=GREEN]([/color][/b]cons 8 [color=#2f4f4f]"cab lines,text,drawing divider,splash,sqft"[/color][b][color=GREEN])[/color][/b]
              [b][color=GREEN]([/color][/b]cons -4 [color=#2f4f4f]"OR>"[/color][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]
   [b][color=FUCHSIA]([/color][/b]command [color=#2f4f4f]"_.ERASE"[/color] ss [color=#2f4f4f]""[/color][b][color=FUCHSIA])[/color][/b][b][color=BLACK])[/color][/b]

-David

If it is all dimension entities not a layer named dimension, then try this:

 [b][color=BLACK]([/color][/b]and
   [b][color=FUCHSIA]([/color][/b]setq ss
      [b][color=NAVY]([/color][/b]ssget [color=#2f4f4f]"X"[/color]
        [b][color=MAROON]([/color][/b]list [b][color=GREEN]([/color][/b]cons -4 [color=#2f4f4f]"<OR"[/color][b][color=GREEN])[/color][/b]
                [b][color=GREEN]([/color][/b]cons 0 [color=#2f4f4f]"DIMENSION"[/color][b][color=GREEN])[/color][/b]
                [b][color=GREEN]([/color][/b]cons 8 [color=#2f4f4f]"cab lines,text,drawing divider,splash,sqft"[/color][b][color=GREEN])[/color][/b]
              [b][color=GREEN]([/color][/b]cons -4 [color=#2f4f4f]"OR>"[/color][b][color=GREEN])[/color][/b][b][color=MAROON])[/color][/b][b][color=NAVY])[/color][/b][b][color=FUCHSIA])[/color][/b]
   [b][color=FUCHSIA]([/color][/b]command [color=#2f4f4f]"_.ERASE"[/color] ss [color=#2f4f4f]""[/color][b][color=FUCHSIA])[/color][/b][b][color=BLACK])[/color][/b]

-David

Thanks David - completely missed the "0" for the dimension - must be blind...

Thanks David - completely missed the "0" for the dimension - must be blind...

Same here. Good catch!

As bad as my eyes are getting, I'm surprised that I saw it. -David