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Delete A Block In Autocad

Updating block is a common issue that AutoCAD users have. Sometimes we need to update a block definition, and sometimes we need to do on multiple files at once. The frequent question I see is how to update title block in multiple files with a new definition. Using a block as the title block is a common practice because we can reserve the text field with attributes. The downside of using a block is when we need to update it. We need to update it on each file.

In this article, we will cover how you can use an AutoCAD script and run it with ScriptPro. We covered ScriptPro before; it might be better if you read it first.

Jul 16, 2015  To manage CAD blocks in a plan. Click on a CAD block marked as DELETED in the list, then click the Undelete button to removed its DELETED designation. When you are satisfied with the CAD block list, click OK to close the dialog and delete all items marked as DELETED. We are ready our block is deleted from the drawing! Delete blocks using Lisp! This is far easier and faster method than using purge command. We just have to use one lisp made by one of the best Proggramers for AutoCAD – Lee Mac.

Block

Preparing the block

Before we start, we need to create the block in a separate file. You need to explode the block, then save it as an external file with WBLOCK command.

Save it with the same name as the block. If you want to update block named “title”, then save it as title.dwg.

Save the file in a folder. In this article, we use D:Data as the example. It’s important to use a specific folder for this purpose and not mixing it with other files. Because we will add this folder in Working Support File Search Path.

Open AutoCAD options. In Files tab, under Working Support File Search Path add the block folder.

You can place your blocks in this folder. When you need to update a particular block, AutoCAD will search in this folder.

Creating the Script

Now let’s create the script. Open text editor application such as Notepad.

Updating a block definition is simple. We insert a block with the same name, and AutoCAD will update the definition after we confirm it.

The script will be like this:

Type the command in the notepad and save the file as “blockupdate.scr”.

Include the double quote to force Windows saving it in the .scr file extension.

The script explained

  • -INSERT is the command to insert a block definition. The – character is to suppress the dialog box. Because we want to run a sequence of command, we need to run it without a dialog box.
  • title= is the block name. Title is the actual block name. You need to add = to allow AutoCAD update the block from an external file. Replace the block name with yours and don’t forget to add =
  • (COMMAND E “RESUME”) is the AutoLISP command to replace Esc key. AutoCAD still asks to define the insert point, scale, and rotation angle. We do not insert another block instance to the drawing, so we can just cancel it. However, after INSERT command we still need AutoCAD to do another command. So we add RESUME after the Esc.
  • QSAVE is to save the drawing file. Remember that ScriptPro doesn’t save the file, we need to define it in the script. Don’t forget to add an empty line below QSAVE.

If you use AutoCAD LT

AutoCAD LT can’t execute AutoLISP command. Mame32 games free download for pc. Therefore you can’t use (COMMAND E) to simulate the Esc key. So you can just add the block and erase it immediately after you place it.

You can use this script as an alternative.

The script will place the block at 0,0,0 with scale 1, rotation 0. Then erase the last object created.

A new line in the script is the same as pressing Enter key once. That’s why we add an empty line after Last. We need to press Enter twice.

Test the script

After you created the script, it is important to try it first. Make sure it works before you run it on dozens of drawings. Check the command line after you execute the script and see if there’s something wrong.

I tried this script on AutoCAD 2018 and AutoCAD LT 2018. You might see different behavior in a different version.

Running the Script with ScriptPro

After you are sure the script is running as expected, now you can run it on multiple drawings. It’s always a good idea to create a backup before we start. Copy the drawing file before you run the script.

We already cover how to run a script on multiple drawings, so you need to open this article to continue: Run a script on multiple DWG with ScriptPro.

Running the Script Even Faster

Garry Nelson gave me an interesting information about AutoCAD Core Console, the accoreconsole.exe.

Find

Using ScriptPro to do a batch process on multiple drawings is very helpful. But as we run it automatically, we don’t need to see the UI. And we don’t even need to see the file when the process run. You can use AutoCAD Core Console to run it much faster; it’s faster than I thought. It runs the process without an interface, without opening the file. It simply runs with the command line.

To use AutoCAD Core Console, you need to change the ScriptPro options. In the AutoCAD application to use, set the application to accoreconsole.exe (see the screenshot below). The file is in the same folder as AutoCAD. Usually in C:Program FilesAutodeskAutoCAD 201x

If you want to read more about AutoCAD Core Console, visit Through the Interface blog: The AutoCAD 2013 Core Console.

Thank you, Garry, for the cool tip!

You can see how it works here

What else can you do with ScriptPro?

ScriptPro is very useful tool, and if you can use it right, it can look like black magic. With AutoCAD Core Console, it literally can save very significant time.

Now if you are already usingScriptPro, for what purposes did you use it? If you haven’t used it, do you have a plan how you are going to use it?

Block is very useful as reusable contents. And when you need to create similar objects in your drawing. One of the most popular benefit is when you need to modify all instances, you only need to modify one. All other instance will be automatically updated.

We will see four method that you can use to modify your block here.

Explode and recreate the block

This is the oldest way I know, the old school. The classic.

A long time ago, the only way to edit a block is by exploding the block to simpler object. Made any changes necessary, then recreate a block with the same name.

However, it’s not possible to recreate the block if you select the block name from drop down list.

You will see this warning if you select the block name from the list.

You need to type the exact block name in the block name field.

If you do it correctly, AutoCAD will ask you for confirmation to redefine the block like below. Select the Redefine block to confirm the changes.

Reinsert the block

Block usually is a reusable content. You create it to use it repeatedly. Because of this reason, you save the block in master file. Whenever you need it, you can simply insert it to your drawing.

If you need to modify the block, then you will want to modify it in master file. But how about the blocks in your drawing?

To update the block definitions in your drawing, you need to insert the updated block to your drawing again. AutoCAD will recognize that the block has the same name with existing block. It will ask you a question like below.

Choose redefine block, and your blocks will be updated.

Using block editor

Block editor is a very powerful tool to edit your block. Not only allow you to modify your block geometry, you can also create a dynamic block here.

You can activate block editor by double clicking a block OR select a block then right click> choose block editor from context menu.

You can also choose edit from AutoCAD ribbon, home tab> block panel.

One thing you must remember. When working with block editor, 0,0 is the insertion point. So don’t move the geometry unless you want to move the insertion point!

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Delete A Block In Autocad 2018

Edit block in-place

Edit block in-place is a great way to modify block when you want to use other objects in the drawing as reference. The tool we use is actually REFEDIT. It was originally for reference editing, but works for blocks too.

You can activate this by selecting a block, right click then choose edit block in-place from context menu. Or by using REFEDIT command.

This tool is not block editor. So don’t expect you will see specific block editing tools like in block editor.

How To Delete A Block In Autocad 2010

Besides the ability to use other objects as reference, there is one more interesting about this method. You can add or remove objects to your block.

Use add or remove from working set from your ribbon.

Don’t forget to click save changes after you finish working with your block.

Which one is your preferred method?

So you have 3 methods to modify block. 4 if you are still using older version. Certainly, which one you use depends on the circumstances. But which one you preferred the most? Which one do you use often?

How Do I Delete A Block In Autocad

Or do you have other method that’s not mentioned here?