ChatGPT Prompts for AutoCAD: AutoLISP & Scripts (2026)

Write an AutoLISP routine for AutoCAD [VERSION] that defines a command called PLATE. When run, it prompts me for length, width and corner radius, then draws a closed LWPOLYLINE rectangle with filleted corners on layer PART, starting at a point I pick. Requirements: millimetre units, a comment on every dimension variable, an undo mark so one U reverses the whole routine, and a proper *error* handler that restores my settings. Then tell me in two sentences how to load it with APPLOAD and run it.

Write an AutoLISP command called BOLTCIRCLE for AutoCAD [VERSION]. It asks for a centre point, a pitch circle diameter, a hole diameter and a hole count, then draws the holes as circles evenly spaced on the pitch circle, plus centrelines through the pattern on layer CL. Include an option to also draw the pitch circle itself as a dashed construction circle. Same rules as always: mm units, comments on every variable, undo mark, *error* handler.

Write an AutoLISP command called SLOT for AutoCAD [VERSION]. It prompts for two centre points and a slot width, then draws the obround as a single closed LWPOLYLINE (two arcs, two lines), not as separate entities, on the current layer, with the centreline drawn on layer CL. Add an optional prompt for a second, concentric clearance outline offset by a value I enter. Comments, undo mark and *error* handler as standard.

Write an AutoLISP command called SHEETA3 for AutoCAD [VERSION] that draws an ISO A3 landscape sheet frame (420 x 297 mm) with a 10 mm margin border on layer FRAME, and a simple title block grid in the bottom-right corner on layer TITLE with cells for Title, Drawing number, Date, Scale, Material and Revision as TEXT entities I can edit. Make every cell size and label a commented variable so I can adapt it to our company standard.

Write an AutoLISP command called FIXLAYERS for AutoCAD [VERSION]. It creates or corrects this layer set: [LIST, e.g. PART white continuous 0.35mm, HIDDEN yellow HIDDEN2 0.25mm, CL red CENTER2 0.18mm, DIM green continuous 0.18mm, FRAME grey continuous 0.35mm]. If a layer exists with wrong colour, linetype or lineweight, fix it; if a linetype is not loaded, load it from acadiso.lin; report what it changed at the command line. Comments, undo mark, *error* handler.

Write an AutoLISP command called CLEANDWG for AutoCAD [VERSION] that runs my standard pre-release cleanup: purge all unused blocks, layers and styles (twice), run AUDIT with fixes, set all text to style [STYLE], move any entity on layer 0 to layer [LAYER], and zoom extents. Print a short report of what it did. Do not delete any visible geometry. Comments, undo mark, *error* handler.

Write AutoLISP for AutoCAD [VERSION] that defines a block called [NAME, e.g. REVTAG]: [DESCRIBE geometry, e.g. a 10 mm circle with a horizontal line through it] with two attributes, REV (default A) and DATE (default today), then defines a command called PLACEREV that inserts it at a picked point at a scale I enter. If the block already exists in the drawing, reuse the definition instead of redefining it. Comments, undo mark, *error* handler.

I need to run the same job on every DWG in a folder using AutoCAD [VERSION]: [JOB, e.g. run my CLEANDWG command, then save, then export a PDF of the layout named A3]. Write (a) the .scr script file that does the job in one open drawing, and (b) a Windows batch file that runs that script on every DWG in C:\WORK\BATCH using accoreconsole.exe, with the correct quoting. Warn me about anything in the job that accoreconsole cannot do headlessly, and say what to test on two copies before I point it at the real folder.

Write an AutoLISP command called BLOCKCOUNT for AutoCAD [VERSION]. It scans the current drawing (model space and paper space), counts every block reference by name, and writes a CSV to the drawing's folder with columns BlockName, Count, and, for blocks with attributes, one extra row per insert listing the attribute values and insertion X,Y. Handle drawings with no blocks gracefully. Comments and *error* handler as standard.

Write an AutoLISP command called SETDIM for AutoCAD [VERSION] that creates (or corrects) a dimension style called [NAME] with these settings: [LIST, e.g. ISO arrows 2.5 mm, text height 2.5 mm, text above the line, mm units with 1 decimal place, extension line offset 1 mm, overall scale by annotation scaling], sets it current, and reports any setting it changed. Make every value a commented variable at the top so the style is editable as code.

Write an AutoLISP command called DIMHOLES for AutoCAD [VERSION]. It asks me to select circles (or select all circles on layer PART), then places a diameter dimension on each using the current dim style, positioned at [ANGLE, e.g. 45 degrees] outside the circle at a distance I enter once. Skip circles that already have a diameter dimension attached if you can detect it, and report how many it dimensioned. Undo mark and *error* handler.

Write an AutoLISP command called FIXTEXT for AutoCAD [VERSION]. It converts all TEXT and MTEXT in the drawing to style [STYLE] at height [H] for notes and [H2] for titles (decide by current height, threshold [T]), moves them to layer TEXT, and uppercases note text without touching dimension text. List anything it skipped and why. Comments, undo mark, *error* handler.

Here is an AutoLISP file we use but nobody understands anymore: [PASTE CODE]. Explain it: what command(s) it defines, what each section does in plain English, what system variables it changes and whether it restores them, any risky behaviour (file writes, command-line calls, entity deletion), and which parts are obsolete for AutoCAD [VERSION]. Then add clear comments throughout without changing any behaviour.

This AutoLISP routine fails in AutoCAD [VERSION]. Here is the code: [PASTE CODE]. Here is exactly what I did and the full error text: [PASTE ERROR]. Find the cause and fix it with the smallest possible change; do not restructure working parts. Show me only the lines you changed with a one-line reason each, then the full corrected file. If the error can have multiple causes, list how to tell which one I have.

Refactor this working AutoLISP routine so I can share it with my team: [PASTE CODE]. Keep the behaviour identical, then: add an undo mark and a proper *error* handler that restores all changed system variables, localise all variables so nothing leaks globally, validate user input (reject zero and negative sizes), replace any hard-coded values with commented variables at the top, and note anything that would break on AutoCAD LT. List every change you made.

I have [an image / a scanned drawing / a photo of a part] and I need an editable DWG in AutoCAD [VERSION]. Lay out the realistic workflow: what a raster attach can and cannot give me, what manual tracing involves and how long it takes, which parts of the tracing you could speed up with AutoLISP helpers (write one if useful), where a dedicated raster-to-vector converter fits, and how to verify scale before anyone manufactures from the result. Be explicit about which steps you cannot do yourself.