JM>    A question for the AutoLISP guys: when defining a Selection 
 JM> Set using SSGET, is there any way to redefine  
 JM> instead of creating a new selection set each time the routine is 
 JM> called? I tried a (setq ss1 nil) but still a new selection set 
 JM> was created the next time...
  
 PD> In reference to selection set. I am using on R12 the following 
 PD> LISp routine in the menu.
 PD> [SELECTION A]^p(if(/=sela nil)(setq sela sela)(setq 
 PD> sela(ssget)));to clear this selection set,
 PD> [CLEAR SEl. A]^p(progn(setq sela nil)(prompt"Group A 
 PD> Cleared.")(terpri)(princ))
 PD> Have this way established 5 difference selection set. It works 
 PD> for me. Anyway let me know how it works out.
  
  Extracting the salient features of your macros (as I understand 
 them), at the command prompt I repeatedly issued:
  
  (SETQ sela nil)
  (SETQ sela sela)
  (SETQ sela (SSGET))
  
  Each time I issued the 3rd line with "ssget", the return response 
 was still incrementing selection sets, ie. by responding with 
 . The variable name "sela" stays constant, but 
 additional selection sets are being created.
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