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After a quick look on GstarCAD, DBX works, though some commands may be different from AutoCAD's. If time allows I might make an attempt to narrow down some options.

in essence I took out the dbx stuf like : (defun dbx_ver ( / v) (strcat "objectdbx.axdbdocument" (if (< (setq v (atoi (getvar 'acadver))) 16) "" (strcat "." (itoa v))))) (setq acApp (vlax-get-acad-object) acDoc (vla-get-ActiveDocument acApp)) (setq dbx (vl-catch-all-apply 'vla-getinterfaceobject (list acApp (dbx_ver)))) (vla-open dbx dwg) ; put all block objects in a list (setq object-list (ss->ol ss)) ; put list with objects in a safe array (setq object-safe-array (vlax-make-safearray vlax-vbobject (cons 0 (1- (length object-list))))) (vl-catch-all-apply 'vlax-safearray-fill (list object-safe-array object-list)) ; copy objects to dbx-drawing (vla-CopyObjects acDoc object-safe-array (vla-get-ModelSpace dbx)) (vl-catch-all-apply 'vla-saveas (list dbx dwg)) (vl-catch-all-apply 'vlax-release-object (list dbx)) (setq object-list nil object-safe-array nil) In lasted version I used : (defun Get_EX_Blocknames (dbDoc / fn l) (if (and (eq (type dbDoc) 'STR)(setq fn (findfile dbDoc)) (setq doc (vla-open (vla-get-documents (vlax-get-acad-object)) fn))) (progn (setq l (GetDocBlockNames doc))(vla-close doc)(vlax-release-object doc))) l) ;;; test (setq lst (GetDocBlockNames (vla-get-ActiveDocument (vlax-get-acad-object)))) (defun GetDocBlockNames ( d / b n l) (vlax-for b (vla-get-blocks d) (if (and (= :vlax-false (vla-get-isxref b)) (= :vlax-false (vla-get-islayout b)) (not (vl-string-search "*" (setq n (vla-get-name b)))))(setq l (cons n l)))) l) instead of using (vla-open dbx dwg) I now used (vla-open (vla-get-documents (vlax-get-acad-object)) fn) using vla-open means you best only use vla- commands and never ever use vla-activate until the very last end because at that point lisp focus will end there and any code left with it. Lisp can only run in one document at the time , but when using vla- commands only it is possible to open and close other drawing and stil maintain lisp focus. Maybe not beginners stuf but me too only got where I am by beg steal & borrow code from others , change things an see what happens. This all costs time but having a wife with her own hobbies or not having a social life all helps

That's not what steven-g used, plus Autodesk shut them down. From Danielm103's link. They suggest BricsCAD now.

What version of GstarCAD are you using? Enhanced API in GstarCAD 2024 I would think anything that runs in AutoCAD LT would work, if I have time and @rlx doesn't get back, I'll try to look at them (I am curious about this). If you could carefully list out what happened with each code in AutoCAD and GstarCAD, it would help.

Out of curiosity, since for me many of the commands you wrote are as understandable as ancient Aramaic: which are the commands that you didn't include in the latest version... and that allowed Lisp to work even on GSTARCAD?

Youre welcome Only tweak I would probably do is to select your basepoint at the same time when you select your objects but that should be easy to do , but its not that importand anyways. For now : paste away ...

I created a pdf with all the steps: as expected by RLX, the lisp works perfectly! 'cbp2.lsp' can be used by those like me who use GStarCAD. Thank you very much! CBP2.pdf

Sounds like your on the right track. Correct, adding a number should not be factored by any position in the dwg. The "stutter" effect would be cool if it's possible (repeats the sequence number for every block with matching attribute values before moving on). Thanks for exploring this1

I used Battman and changed the attribute order that way my default sort and count worked. using Battman can move attribute order not actual position in block. Ok part 2 is to add a number to each block where attributes are the same that is a new step in my program, but have something. getting way more complicated. The auto number would be based on the "1st sort order attribute" so a 1000=1, 1100=2 and so on not based on position in dwg is that ok ?

Hello. I’m fairly new to Revit so I’m probably going to butcher this question. Is it possible to place different devices throughout a floor plan, based solely on the Room Tag. For instance, if there was a schedule that contained all of the different room names, could I go through that line by line and for a classroom, insert device A, for a kitchen, insert device B. Then when I opened up the floor plan, all of those devices would be there and I would just have to fine tune their location. Hopefully that made sense.

Yeah, that was LT-Extender https://www.lt-extender.com/LT-Extender/englisch/default.htm I can’t see how companies could buy a cad package that does not have a robust API. There’s a lot of competition in this space these days.

"Was an AutoCAD LT expert" there was lisp enabler and pretty sure Autodesk legal team shut them down. It was produced way back around 2005. It was called LT-Extender. Google can find some info about it.

Did you try changing 57.40259411 not sure bigger or smaller needed, not tested.

Yes I have draw a grid on a viewport, rotation is supported, may cost you a cup of coffee.

You can try if this works better. No dbx in this version Start app , make selection , select drawing you want to paste in later. This drawing is shortly opened (not sure if it works if drawing is already open) List with blocknames is created and drawing is closed. Blocknames are compared and if duplicates are found message is displayed. You can choose 1- Stop , 2 - Rename the blocks in drawing you made the selection set (not the other drawing), or 3 - copy / paste as it is. Only thing left to do is select your basepoint (or replace 'pause' with "0,0" in the code) and selection set is placed on clipboard , ready to paste. ;;; check before paste - rlx 2025-10-22 (defun c:cbp ( / this-dwg ss other-dwg blocknames-in-selectionset blocknames-in-other-dwg duplicate-blocknames dbx-doc) (setq this-dwg (vla-get-ActiveDocument (vlax-get-acad-object))) (if (and (setq ss (ssget)) (setq other-dwg (getfiled "Drawing to check before you paste" "" "dwg" 0))) (progn (if (vl-consp (setq blocknames-in-selectionset (Get_SS_BlockNames ss))) (setq blocknames-in-selectionset (mapcar 'strcase blocknames-in-selectionset))) (if (vl-consp (setq blocknames-in-other-dwg (Get_EX_Blocknames other-dwg))) (setq blocknames-in-other-dwg (mapcar 'strcase blocknames-in-other-dwg))) (setq duplicate-blocknames (compare_block_names blocknames-in-selectionset blocknames-in-other-dwg)) (if (vl-consp duplicate-blocknames) (progn (dplm duplicate-blocknames "Duplicated block names : ") (setq inp (cfl (list "1 - I'm not gonna paste" "2 - Rename blocks before pasting" "3 - I'm gonna paste anyway"))) (cond ((or (void inp) (wcmatch inp "1*")) (alert "Copybase aborted")) ((wcmatch inp "2*")(foreach b duplicate-blocknames (rename_block_definition b)) (princ "\nBlocks are renamed - select your basepoint now") (command "_copybase" pause ss "")) ((wcmatch inp "3*") (princ "\nBlock names unchanged - select your basepoint now")(command "_copybase" pause ss "")) (t (princ"\nBite me...")) ) ) (progn (princ "\nNo duplicate block names found - select your basepoint")(command "_copybase" pause ss "")) ) ) ) (princ) ) ;;; get block names active doc - vanilla (defun _bl ( / b l ) (while (setq b (tblnext "BLOCK" (null b))) (if (zerop (boole 1 21 (cdr (assoc 70 b)))) (setq l (cons (cdr (assoc 2 b)) l)))) l) (defun Get_EX_Blocknames (other-dwg / fn l) (if (and (eq (type other-dwg) 'STR)(setq fn (findfile other-dwg)) (setq doc (vla-open (vla-get-documents (vlax-get-acad-object)) fn))) (progn (setq l (GetDocBlockNames doc))(vla-close doc)(vlax-release-object doc))) l) ;;; test (setq lst (GetDocBlockNames (vla-get-ActiveDocument (vlax-get-acad-object)))) (defun GetDocBlockNames ( d / b n l) (vlax-for b (vla-get-blocks d) (if (and (= :vlax-false (vla-get-isxref b)) (= :vlax-false (vla-get-islayout b)) (not (vl-string-search "*" (setq n (vla-get-name b)))))(setq l (cons n l)))) l) (defun create_unique_blockname ( $bn / i bn) (setq i 0)(while (tblsearch "block" (setq bn (strcat $bn "_" (itoa (setq i (1+ i))))))) bn) (defun rename_block_definition ( $bn / bc bn ) (setq bc (vla-get-blocks (vla-get-ActiveDocument (vlax-get-acad-object)))) (if (and (not (void $bn)) (tblsearch "block" $bn)) (vla-put-name (Collection-Member $bn bc)(setq bn (create_unique_blockname $bn)))) bn) (defun compare_block_names (a b / c) (and (vl-consp a) (vl-consp b) (foreach item a (if (member item b) (setq c (cons item c))))) c) (defun Get_SS_BlockNames ( ss / n l) (foreach o (ss->ol ss)(if (and (setq n (block-n o))(not (member n l)))(setq l (cons n l)))) l) (defun SS->OL (ss / i l)(setq i 0)(repeat (sslength ss)(setq l (cons (vlax-ename->vla-object (ssname ss i)) l) i (1+ i))) l) (defun void (x) (or (eq x nil)(and (listp x)(not (vl-consp x)))(and (eq 'STR (type x))(eq "" (vl-string-trim " \t\r\n" x))))) (defun block-n (o)(if (and (= 'vla-object (type O))(eq (vla-get-objectname O) "AcDbBlockReference")) (if (vlax-property-available-p o 'EffectiveName) (vla-Get-EffectiveName o) (vla-Get-Name o)) nil)) (defun Collection-Member (m c / r) (if (vl-catch-all-error-p (setq r (vl-catch-all-apply 'vla-item (list c m)))) nil r)) ;;; display list (plus message) (defun dplm (l m / f p d w) (and (vl-consp l) (setq l (mapcar 'vl-princ-to-string l)) (setq w (+ 5 (apply 'max (mapcar 'strlen l)))) (setq p (open (setq f (vl-filename-mktemp ".dcl")) "w")) (princ (strcat "cfl:dialog{label=\"" m "\";:list_box {key=\"lb\";" "width="(itoa w)";}ok_only;}") p)(not (setq p (close p)))(< 0 (setq d (load_dialog f)))(new_dialog "cfl" d)(progn (start_list "lb") (mapcar 'add_list l)(end_list)(action_tile "accept" "(done_dialog)")(start_dialog)(unload_dialog d)(vl-file-delete f)))) ;; choose from list (cfl '("1""2""3")) (defun cfl (l / f p d r) (and (setq p (open (setq f (vl-filename-mktemp ".dcl")) "w")) (princ "cfl:dialog{label=\"Choose\";:list_box{key=\"lb\";width=40;}ok_cancel;}" p) (not (setq p (close p)))(< 0 (setq d (load_dialog f)))(new_dialog "cfl" d) (progn (start_list "lb")(mapcar 'add_list l)(end_list)(action_tile "lb" "(setq r (nth (atoi $value) l))(done_dialog 1)") (action_tile "accept" "(setq r (get_tile \"lb\"))(done_dialog 1)")(action_tile "cancel" "(setq r nil)(done_dialog 0)") (start_dialog)(unload_dialog d)(vl-file-delete f))) (cond ((= r "") nil)(r r)(t nil))) edit : just had an idea , why not open the 'to be pasted' drawing after you made your selection. Also tried if it was a bad thing if both drawings were already open and yes , that's bad... but then I'm a bad bad dragon (it still opens but as read only) Because I use vla-activate at the end , all lisp stops (obviously) Once drawings is activated you can copypaste / ctrl-V yourself (I'm sure as hell not comming to do that for you ) You decide what make you happy... ;;; check before paste 2 : after selection open the 'to be pasted' drawing - rlx 2025-10-22 (defun c:cbp2 ( / acDoc *docs* ss dbDoc blocknames-in-selectionset blocknames-in-dbDoc duplicate-blocknames inp do-it) (setq acDoc (vla-get-ActiveDocument (vlax-get-acad-object)) *docs* (vla-get-documents (vlax-get-acad-object))) (if (and (setq ss (ssget)) (setq dbDoc (getfiled "Drawing to check before you paste" "" "dwg" 0))) (progn (if (vl-consp (setq blocknames-in-selectionset (Get_SS_BlockNames ss))) (setq blocknames-in-selectionset (mapcar 'strcase blocknames-in-selectionset))) (if (vl-consp (setq blocknames-in-dbDoc (Get_EX_Blocknames dbDoc))) (setq blocknames-in-dbDoc (mapcar 'strcase blocknames-in-dbDoc))) (setq duplicate-blocknames (compare_block_names blocknames-in-selectionset blocknames-in-dbDoc)) (if (vl-consp duplicate-blocknames) (progn (dplm duplicate-blocknames "Duplicated block names : ") (setq inp (cfl (list "1 - I'm not gonna paste" "2 - Rename blocks before pasting" "3 - I'm gonna paste anyway"))) (cond ((or (void inp) (wcmatch inp "1*")) (alert "Copybase aborted")) ((wcmatch inp "2*")(foreach b duplicate-blocknames (rename_block_definition b)) (princ "\nBlocks are renamed - select your basepoint now") ;|(command "_copybase" pause ss "")|; (setq do-it t)) ((wcmatch inp "3*") (princ "\nBlock names unchanged - select your basepoint now") ;|(command "_copybase" pause ss "")|; (setq do-it t)) (t (princ"\nBite me...")) ) ) (progn (princ "\nNo duplicate block names found - select your basepoint") ;|(command "_copybase" pause ss "")|; (setq do-it t)) ) ) ) (if do-it (do_it)) ) (defun do_it ( / f d) (command "_copybase" pause ss "")(and (eq (type dbDoc) 'STR) (setq f (findfile dbDoc))(setq d (vla-open *docs* f)))(vla-activate d)) ;;; get block names active doc - vanilla (defun _bl ( / b l ) (while (setq b (tblnext "BLOCK" (null b))) (if (zerop (boole 1 21 (cdr (assoc 70 b)))) (setq l (cons (cdr (assoc 2 b)) l)))) l) (defun Get_EX_Blocknames (dbDoc / fn l) (if (and (eq (type dbDoc) 'STR)(setq fn (findfile dbDoc)) (setq doc (vla-open (vla-get-documents (vlax-get-acad-object)) fn))) (progn (setq l (GetDocBlockNames doc))(vla-close doc)(vlax-release-object doc))) l) ;;; test (setq lst (GetDocBlockNames (vla-get-ActiveDocument (vlax-get-acad-object)))) (defun GetDocBlockNames ( d / b n l) (vlax-for b (vla-get-blocks d) (if (and (= :vlax-false (vla-get-isxref b)) (= :vlax-false (vla-get-islayout b)) (not (vl-string-search "*" (setq n (vla-get-name b)))))(setq l (cons n l)))) l) (defun create_unique_blockname ( $bn / i bn) (setq i 0)(while (tblsearch "block" (setq bn (strcat $bn "_" (itoa (setq i (1+ i))))))) bn) (defun rename_block_definition ( $bn / bc bn ) (setq bc (vla-get-blocks (vla-get-ActiveDocument (vlax-get-acad-object)))) (if (and (not (void $bn)) (tblsearch "block" $bn)) (vla-put-name (Collection-Member $bn bc)(setq bn (create_unique_blockname $bn)))) bn) (defun compare_block_names (a b / c) (and (vl-consp a) (vl-consp b) (foreach item a (if (member item b) (setq c (cons item c))))) c) (defun Get_SS_BlockNames ( ss / n l) (foreach o (ss->ol ss)(if (and (setq n (block-n o))(not (member n l)))(setq l (cons n l)))) l) (defun SS->OL (ss / i l)(setq i 0)(repeat (sslength ss)(setq l (cons (vlax-ename->vla-object (ssname ss i)) l) i (1+ i))) l) (defun void (x) (or (eq x nil)(and (listp x)(not (vl-consp x)))(and (eq 'STR (type x))(eq "" (vl-string-trim " \t\r\n" x))))) (defun block-n (o)(if (and (= 'vla-object (type O))(eq (vla-get-objectname O) "AcDbBlockReference")) (if (vlax-property-available-p o 'EffectiveName) (vla-Get-EffectiveName o) (vla-Get-Name o)) nil)) (defun Collection-Member (m c / r) (if (vl-catch-all-error-p (setq r (vl-catch-all-apply 'vla-item (list c m)))) nil r)) ;;; display list (plus message) (defun dplm (l m / f p d w) (and (vl-consp l) (setq l (mapcar 'vl-princ-to-string l)) (setq w (+ 5 (apply 'max (mapcar 'strlen l)))) (setq p (open (setq f (vl-filename-mktemp ".dcl")) "w")) (princ (strcat "cfl:dialog{label=\"" m "\";:list_box {key=\"lb\";" "width="(itoa w)";}ok_only;}") p)(not (setq p (close p)))(< 0 (setq d (load_dialog f)))(new_dialog "cfl" d)(progn (start_list "lb") (mapcar 'add_list l)(end_list)(action_tile "accept" "(done_dialog)")(start_dialog)(unload_dialog d)(vl-file-delete f)))) ;; choose from list (cfl '("1""2""3")) (defun cfl (l / f p d r) (and (setq p (open (setq f (vl-filename-mktemp ".dcl")) "w")) (princ "cfl:dialog{label=\"Choose\";:list_box{key=\"lb\";width=40;}ok_cancel;}" p) (not (setq p (close p)))(< 0 (setq d (load_dialog f)))(new_dialog "cfl" d) (progn (start_list "lb")(mapcar 'add_list l)(end_list)(action_tile "lb" "(setq r (nth (atoi $value) l))(done_dialog 1)") (action_tile "accept" "(setq r (get_tile \"lb\"))(done_dialog 1)")(action_tile "cancel" "(setq r nil)(done_dialog 0)") (start_dialog)(unload_dialog d)(vl-file-delete f))) (cond ((= r "") nil)(r r)(t nil)))

See what this does. https://www.cadtutor.net/forum/topic/14213-lisp-to-create-polyline-between-polylines/#findComment-117973

Thanks, @lrm It seems your method relies on there being pairs of points close together between both polylines. But when several points accumulate on one of them and don't find a corresponding point on the other, the calculated axis deviates from the center, and the method loses consistency. To keep these cases under control, I think it is best to manage them using a Lisp. But maybe I'm wrong

... in fact, ALL (CFD CFLD CAPFD) give me an error: I don't know what I did the first time I used the first file, it even worked on GStarCAD. If I remember correctly, I ran the command with the selection in progress... who knows (!) apparently I bypassed something... but now I can't replicate those steps.

Here's a simpe solution that doesn't use LISP. Change the elevation of one of the polylines to 1.0 then use the loft command to create asurface. Section the resulting surface with an XY plane at 0,0,0.5.

I'm a little confused , you say the first lisp gives a warning about duplicate block names in the second drawing and that's also dbx , so maybe its the renaming part that uses commands not supported by GStarCad?

If you have a debugger (for GStarCAD, VS Code I suppose), the ideal would be to put a breakpoint in the code at the end of this line: "(setq acApp (vlax-get-acad-object) acDoc (vla-get-ActiveDocument acApp))" and this: "(setq dbx (vl-catch-all-apply 'vla-getinterfaceobject (list acApp (dbx_ver))))" And then run it again If the code runs up to the first breakpoint and then continues execution and doesn't stop again at the next breakpoint because the error occurs first, the problem is access to DBX

Then it is possible that your version of GStarCAD does not have access to DBX from Lisp.

like i said its not really the avg per say because its missing data points. should probably use the larger/longer poly to pull points from (or maybe both and avg it out). The blue line is suffering from not enough detail since its only calculating off the vertex. i can't test right now but see if the selecting order changes anything. Also change the following and should get a better path. tho it will create a poly with 10x the vertex of selected one. (setq i (+ i 0.1))

Is this a dynamic block? If not, that might be the way to handle this situation.

Thanks again for your code, @mhupp It seems that the differences in the turning zones between the resulting geometry and the expected geometry persist. I must say that the goal is to obtain an axis that remains equidistant from the reference polylines at all times. I thought this problem would easily find a solution here. Maybe I was wrong