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CAD tip CAD tip # 9553:

Question CAD 
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Q - question

Complete thorough PURGE on a single click.

A - answer Most AutoCAD users probably know the command PURGE for removing unused definitions of blocks, styles, lineptypes, dimension styles, etc. from a DWG file.

If you need to automate purging in your drawings, you can use a simple menu macro (to assign to a button click in your ribbon) or a script. For this, you will use the commandline version of the Purge command, i.e. -PURGE. Remember that not all tables and objects are purged with the option "All", so you will need to separately invoke purging of some special objects (registered applications, zero-length geometry, empty texts). Another special type of object are the DGN linetype definitions - there is a special DGN-hotfix for them (see Download) with the command DGNPURGE. Due to possible nested objects, it is advisable to repeat the purging process a couple of times.

Then the resulting script for purging really all excessive unused objects and definitions from the current DWG drawing looks like this:

_-PURGE _ALL * _N  
_-PURGE _ALL * _N  
_-PURGE _ALL * _N  

Except DGNPURGE, you can perform this purging also in AutoCAD LT. You can also use this script to batch-purge drawings with ScriptPro.

UPDATE: Since version 2015 you can use _-PURGE _Orphaned instead of loading and calling DGNPURGE.

Please note that all these purge commands can be executed - e.g. with a .SCR script - also in the console (non-graphical) version of AutoCAD, AcCoreConsole.exe. See the Tip 8552.

100% *  CAD 
19.11.2013    36769×  

See also:
Tip 13675:Two PURGE commands in Autodesk Civil 3D.
Tip 12933:Purging small objects from a DWG drawing - PurgeSmall.
Tip 12592:How to automatically purge old backup files .BAK?
Tip 12198:How to remove duplicate points and COGO points from a DWG?
Tip 11439:Replace block instances (incl. dynamic) with another block.

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