Converting list to selction set

[p7q]

Hello everybody,  I need a selection set for flatten command. but ı have a list what include entity. So ı think to convert list to selection set.

(setq objList '())
(while ....
(if ...
(setq objList (append (list obj) objList))
)
)
(setq selSet (ssadd))
(foreach ent objList
  (ssadd ent selSet)
)

I used to this code but now not working. Where ı make a mistake? Can u help me?

[GLAVCVS]

Hi
Without first knowing what's in 'objlist', it's difficult to know why its entities aren't included in the set.
It's essential to know what the previous 'while' process is.
In principle, if 'objlist' is a list of entity names, the code should work.

[GLAVCVS]

So: make sure 'objlist' is a list of entity names

[p7q]

 

 

  On 4/4/2025 at 12:36 PM, GLAVCVS said:

Hi
Without first knowing what's in 'objlist', it's difficult to know why its entities aren't included in the set.
It's essential to know what the previous 'while' process is.
In principle, if 'objlist' is a list of entity names, the code should work.

Expand  

 

here it is. 

[GLAVCVS]

Then it should work.
The only explanation should be in the part of your code that isn't visible from the 'while' loop.

[p7q]

I solved it now. The problem is that you do not use

(sssetfirst nil ss)

after   

(setq ss (ssget))

. Thank you for your interest @GLAVCVS

[GLAVCVS]

[p7q]

  On 4/7/2025 at 8:16 AM, GLAVCVS said:

Expand  

I saw that it happened but it didn't happen again today and I can't find it. Could you please look again?

(foreach ennt	inBlock
    (setq entType (cdr (assoc 0 (entget ennt))))
    (setq entName (cdr (assoc -1 (entget ennt))))
    (if (member entType '("CIRCLE" "ARC" "ELLIPSE" "REGION"))
	       (progn
	   (ssadd ennt ssel)
	   (ssadd entName ssel)
	   )
      (SetZZero ennt)
	  )
  )

 

[GLAVCVS]

Assuming 'inBlock' is a list of non-VLA objects, it seems like it should work.
The only thing is: 'ennt' and 'entName' are redundant. That is, you're trying to include the same object twice in the set.

[p7q]

I wanted to try both versions because I wanted to see the real version but neither one works

Edited 2 hours ago by p7q