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@exceed looking at your gif, I suppose, you could avoid selecting twice... Perhaps, consider something like this (given the fact that one group of text entities is with starting syntax "CH*" (chainage) )... ... (setq sstxt (ssget "_:L" '((0 . "TEXT")))) ;;; only single selection needed ;;; (setq ss1 (ssget "_P" '((1 . "CH*")))) ... (sssetfirst nil sstxt) (setq ss2 (ssget "_I" '((1 . "~CH*")))) ... Altentatively for ss2, you could also use (acet-ss-remove) function with sstxt and ss1...

Thanks all for your help lisp are work fine

Why are you needing to do this stretch maybe?

Need lots more details what is a 3D groundpoly ? If its a 3dpoly then can ssget all 3dpoly's and compare min Z.