No layers information

One of my colleagues noted that they no longer could see the layers information in the Layers Drop down box when selecting objects.

autocad_pickfirstoff

The image above shows this issue, the object is on a differing layer to that shown, the Layers Drop down only shows the current layer.

In order to fix this the system variable PICKFIRST needs to be set to 1, which should be the default for this variable. Sometimes if AutoCAD crashes this seems to be reset to 0. Now when the object is selected it should display the layer information in the Layers Drop down.

autocad_pickfirston

Paperspace hidden by Modelspace Wipeout

One of my colleagues came to me today with this conundrum; the wipeout in modelspace was hiding paperspace objects. This was happening both on the screen and when plotting.

Wipeout Problem

Here you can see that the orange circle is hidden behind the blues lines. The blue lines are in model space and are the frames of the wipeout and the orange circle is in paper space.

When plotting the circle stays behind the blue lines.

The solution to plotting side of things is to ensure Paperspace is plotted last.

Wipeout Check Box

When plotting you can find this option on the right hand side. Check the plot paperspace last box.

Wipeout Solved

Now the plot will show the circle in paperspace above the wipeout in modelspace.

One one drawing I found that if you turn off wipeout frames and back on again the display is corrected, however on another this does not work. In order to turn off wipeout frames type WIPEOUT –> then F –> then OFF and then turn them back on again (WIPEOUT –> F –> ON).

 

Unexplodable Blocks

One of my colleagues today posed the question, why doesn’t my block explode? Firstly, I thought this was impossible, but I was wrong!

The first issue is check that it is not a group, they are very similar on the surface and can be mistaken for blocks and visa versa! X or explode cannot work on groups.

However X or explode can sometimes not work on blocks. There is a setting for blocks that I had never noticed under the block creation box, called “allow exploding”, uncheck this and your blocks cannot be exploded!

In order to get around this, bring up the block edit dialogue with nothing selected.

Then select the offending block in the list and check the “allow exploding” box. Now click OK. Yes to redefine. Note this might cause some issues with placing!

explodeblock

Now the block can be exploded!

 

No Thumbnails

One of my colleagues was struggling with files that did not have thumbnails. According to this (very helpful) post this is due to the THUMBSAVE setting not being set to 1.

This is a setting that is saved globally per machine but affects drawings. This can be confusing as there are global settings and drawing specific settings. Drawings saved on a machine with this off won’t create a thumbnail in the file.

Flickering update

It appears that Autodesk has not fixed the AutoCAD LT 2014 flickering issue in their recent update to service pack one. Very frustrating as it makes the software hard to use. It seems to occur less often now rather than all the time. So I will try the registry patch on this machine to see what that does.

Hatching and XREFs

It appears that there is a fundamental flaw in AutoCAD where if you clip an XREF the information AutoCAD requires in order to HATCH objects in the XREF is lost, therefore AutoCAD cannot HATCH an clipped XREF. How dumb is that.

Retaining XREF Layouts

One of my colleagues was getting very frustrated with the XREF he was using, he had set up an XREF, turn off the layers as he wanted, then saved and exited the drawing. Upon reopening the drawing he found these changes were reset to the layers on the XREF source.

AutoCAD appears to be setup strangely on my colleagues machine where it prefers to inherit layering from the source. Whilst this is a logical method it doesn’t help new users to understand how to “lock” their XREFs. By default AutoCAD should be in the “locked” mode.

Frustratingly AutoCAD also appears to have no visual way to set VISRETAIN, a toggle for XREF state in the XREF manager would be nice, perhaps a check box with a note next to it saying “Check to retain layer information in current drawing”. That way people will know what is going on!

So its back to the command line, type VISRETAIN and then set to 1 for keeping the layers in the current drawing as you want them or 0 to inherit from source.

—-

From AutoCAD help: (Copyright Autodesk).

VISRETAIN
0
The layer table, as stored in the reference drawing (xref), takes precedence. Changes made to xref-dependent layers in the current drawing are valid in the current session only and are not saved with the drawing. When the current drawing is reopened, the layer table is reloaded from the reference drawing, and the current drawing reflects all of those layer property settings.
1
Xref-dependent layer changes made in the current drawing take precedence. Layer settings are saved with the current drawing’s layer table and persist from session to session.

 

Inverted Arc

Ever been annoyed with AutoCAD and its silly way of drawing arcs? You always seem to managed to draw it the wrong way even though you are sure you started it in the correct place to go anti-clockwise?

No longer a problem in AutoCAD 2014! Just hold CTRL down to reverse the arc direction!

Fields of Polylines

I regularly need to obtain areas for floor plans in the projects I work on. I have always drawn a polyline and then looked at the properties palette and knocked off 6 decimal places to get the result. Then this is written down on a non-printing layer.

I was thinking, there has to be an easier way, especially one that updates the area when the design changes.

Well there is! Fields. To access this click on the insert tab and click on field. Or type FIELD.

Fields01

Once you click this button you will be presented with a large box with a list of fields that can be used within it.

fields02

Scroll down to object, in the second column there is a small button to select the object in question. Select your polyline. The box will now update to the properties of that object, here you can select “area” and the result will display in the last column.

fields04

Now you can click OK to place the field object wherever you would like it! Or you can alter the precision, or in my case I wanted the result in square metres and not square mm which is the default.

In order to change format or add suffices etc. click on Additional Format. Now you get another box wher you can alter the way the field is displayed.

fields03

I used a conversion factor to produce the square metre information required.

And that is it! You now have a value that alters when you change the polyline size. If it doesn’t update, try REGEN or click on update fields in the Data section of the Insert tab.

Ultra Large PDF

One of my colleagues created a 7MB PDF from a CAD file today. This in itself is a sure sign that something was wrong with either the PDF or the generation of it. So after crashing Acrobat in an attempt to reduce the file size, I reviewed the PDF to see what might be the issue.

One part of the PDF took a while render in Acrobat which pointed out that the PDF contained something with dense information that was taking a while to load. Usually this is an image or some large single object like that.

Once I reviewed the source I discovered that there was no images attached to the file. So this was not the issue.

A quick Audit revealed 4 errors but this was not the issue either.

So, process of elimination. What is causing the issue. Delete various items from the sheet to see which item is cuasing the issue. I usually start with viewports.

This was done by deleting one at a time and creating a PDF each time. Each time I noted that the PDF was taking ages to generate, which also is a sign that something is not quite right.

Once I found the viewport I could look at that part of the model to see what the issue could be. From experience hatches can be problematic and it turned out that my colleague had created an ultra dense hatch that looked like a solid. Once changed to a solid hatch (which I don’t like, but that’s another story), the file printed file.

Interestingly AutoCAD sometimes pops up a box saying to convert these to solid or increase the scale but it did not do so on this drawing, so don’t rely on that to tell you if there is an issue with ultra-dense hatches.