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Trim not working

EDGEMODE = 1

TRIMMODE = 1

These are the usual solutions when trim is not working with extension of the lines. Other issues that I have encountered are lines not being on the same plane, i.e. they are on different elevations, or some lines are 3DPOLYLINEs.

If the lines being on different elevations is unintentional, just select all the lines, and then in properties, set elevation to 0 for all.

For turning 3DPOLYLINEs to 2DPOLYLINEs, easiest way is to download a lisp script. I found one that does just that. Search online for pline-3d-2d.lsp, I found it here:

forums.autodesk.com/t5/autocad-forum/3d-polyline-to-2d-polyline/m-p/2561187#M278793


Hatch problems

AutoCAD has had hatching issues since forever and hasn’t been able to fix them so far. It’s always a good idea to save the drawing before attempting a hatch, as sometimes AutoCAD just crashes when you try to hatch. Some common hatch issues and their workarounds are described below.

Hatch not working

Hatch can have a lot issues, sometimes there are very small gaps in what seems to be a closed boundary.

The worse issue I have come across, which took a while to figure out is if you have multiple coincident points, which are adjacent in the vertex array of a polyline, then AutoCAD refuses to work.

Hatch becoming solid instead of showing the selected pattern

Apart from the usual Scale issue of a hatch, sometimes the hatch just doesn’t accept any pattern and appears solid, whatever you do.

In some drawings, it worked by changing the units from Unitless to mm or m – which obviously is a bug, but in other cases I did not find the reason or a workaround to do a new hatch.

In some cases, Match Properties works from an existing hatch on to a solid hatch, but not always. If Match Properties also doesn’t work then copying an existing hatch and then grip editing it to the boundary works.

Hatch not changing angle, and Match Properties not working

I’ve encountered this with custom hatches which are not installed on the machine. Angle can’t be changed, but the hatch can be Rotated to the desired angle. Then you have to edit the boundary with grips.

Match Properties also doesn’t work for the custom hatches which aren’t installed on the machine, however existing hatches can be copied and then edited with grips to match a new boundary. Easier to copy the hatch from the key/legend as it usually only has 4 nodes/corners.

Custom Hatch patterns not working

If you write your own custom hatch patterns, errors in definition can throw up errors, show distorted patterns, or not show any patterns at all are usually because of syntax or logical errors in the definitions.

Matching Hatch scale in Model Space and Paper Space

Don’t copy paste from Model Space to Paper Space or vice versa. Change space (CHSPACE) through a viewport for automatic translation scale factor.


Model Space linetype scale not matching in Paper Space

PSLTSCALE


Attributes in a Title Block not showing up

Check ATTSYNC and ATTDISP

Check that attributes are not on a layer that is turned off in any way from displaying or printing

Check that attributes or their layer is not set to a shade of white such as 255,255,255

Check that they are not moved off the sheet by doing a zoom extents

Try REGENALL

I’ve encountered cases where none of the above worked, so if you have other solutions, let me know.


Getting rid of the ribbons and activating the classic menu and toolbar icons

If you have been using AutoCAD for a long time, and have developed speed using toolbars and menus, you will find that ribbons cannot match that efficiency. They may have been developed for touch screens, but a mouse is the most effective interface device for AutoCAD’s GUI. To AutoDesk’s credit, they are still keeping the full range of input methods available, and people can choose what they want (unlike Microsoft! Completely messed up MS Office). Though in many versions you have to set things up step by step rather than just asking AutoCAD to restore the classic interface. Though I have come across a utility on AutoDesk website that did it easily, not sure if it was developed by AutoDesk. There are plenty of online tutorials, so just search for them online.


AutoCAD free alternatives

AutoCAD being very expensive for personal use, it seems to be aimed at companies with sufficient funds. Even though AutoDesk is quite good with providing trial versions and educational versions, I haven’t come across a cheap(er) option for hobbyists and enthusiasts like they do for Fusion 360 now.

To fill that gap, sometimes you can come across clones of AutoCAD. At some point Draghtsight 2D was free from Dassault Systems, but they have started charging now.

These days, you can get NanoCad for free. It’s another AutoCAD clone, and it’s quite good. But it still has small bugs here and there. Maybe they will start charging too when they have ironed out these small issues.

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