Lisp file compatability in AutoCAD 2018 or 2019

[rmishmash]

I am currently using the attached files to create a flat pattern. All files and the flat patterns are attached. At the current time, the routine creates the pattern without fillets on the corners and we manually add the fillets that are seen in the second pattern. I have an Excel spreadsheet that outputs the information found in the .out file and the Lisp routine reads that file and draws the pattern. The intent is to continue using the Excel file to produce the data needed in the lisp. We currently use the Lisp routine on both ACAD 2002 and ACAD 2014. Before we upgrade the computer and software on the machine using this pattern, I need to know if the routine as written will still work with ACAD 2018 or 2019. After that, is there a way within the lisp routing to add the fillets? Is it possible that this is better addressed with a VBA routine? The data in the .out file follows this format: 62.8277 point 1 'x' coord 62.5066 point 1 'y' coord -62.8277 point 2 'x' coord 62.5066 point 2 'y' coord 31.03 point 3 'x' coord 37.5992 point 3 'y' coord -37.6834 point 4 'x' coord 30.9277 point 4 'y' coord -61.0354575587148 hole 1 center 'x' coord 63.1435914471796 hole 1 center 'y' coord 37 Number of holes -86.45382 Included arc of all holes for Array

[ВeekeeCZ]

I do understand your caution. BUT since this lisp is obviously sensational to your work how about download a trial acad 2019 and do a proper testing by yourself!!!

And btw, this file I should imagine?!

(setq inf1 (open "c:\\ptc\\belting\\seglast.out" "r")

[rmishmash]

Thanks for the suggestion. I hadn't even considered doing that. I have presented to IT and will continue to leave this for comments.