AutoCAD 2015 Purge DGN Junk

That’s right, I called it “Junk”.

Recently we have been experiencing excessive bloating of files because somewhere in our project someone has either referenced in a drawing that was opened with Microstation or they have copied in something from a drawing that was used by Microstation.

Below is an example of a drawing that was almost 14 megabytes in size and needed to email it to someone out “in the field” but because of its file size, it was too large to email.
PURGE DGN 1

 

When you start the PURGE command in AutoCAD 2015, you now have the option to purge “Orphaned data.” AutoCAD apparently handles Microstation linestyles and text styles differently so the info that defines these objects becomes “orphaned” and can bloat drawings severely.

Check the box as shown below

PURGE DGN 2

 

If you have any of this purge-able data, the progress of the purge will be shown in the lower right of the AutoCAD screen (shown below)

PURGE DGN 3

 

To purge the “Orphaned” DGN junk from your drawings using the command line version of PURGE command in a script or macro, use the O (letter O) after issuing -PURGE from the command line.

PURGE DGN 4

 

Note: after purging what could be a lot of data from a drawing, it is a good idea to AUDIT your drawing. In the command line, enter AUDIT [enter] Y [enter]

For more info about how to purge unused DGN info from your drawings, check out these links:

Autodesk’s hotfix for AutoCAD 2013 & 2014: http://knowledge.autodesk.com/support/autocad/downloads/caas/downloads/content/autocad-C2-AE-dgn-hotfix.html

Kean’s explanations:

http://through-the-interface.typepad.com/through_the_interface/2012/12/purging-unwanted-dgn-linestyle-data-from-an-autocad-drawing-using-net.html

http://through-the-interface.typepad.com/through_the_interface/2013/07/autocad-dgn-hotfix-now-available.html

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About AutoCAD Tips

This blog serves as a knowledge base for myself (and anyone else) so that I can reference tips & tricks that I have learned and also refer others to it as well. I hope that this blog helps you learn at least one tip to make your drafting/design experience better.
This entry was posted in AutoCAD 2015, Manage, New in 2015. Bookmark the permalink.

One Response to AutoCAD 2015 Purge DGN Junk

  1. Cody Fox says:

    I think its important to not that this gets rid of the extra unused garbage in the file, it does not compress files.

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