Some DWG files cannot be purged with DGNPURGE in Autocad

 Issue:

When using the DGNPURGE command in AutoCAD 2012, 2013, or 2014 (from the DGN Hotfix), the process repeatedly shows the following message and then ends with the notation that zero unreferenced linetypes or zero strokes were purged:
 

Unable to erase stroke (AcDbZombieObject): eNotAllowedForThisProxy

Causes:

Third-party add-ons or plug-ins may conflict with DGNPURGE. It is also possible that your AutoCAD installation is missing some registry keys that allow it to work with the DGN Hotfix files.

Solution:

To resolve the problem with DGNPURGE, try each of the following:

• Type DEMANDLOAD on the command line in AutoCAD and set the value to zero.

• Uninstall any third-party add-on or plug-in that you have added to AutoCAD.

• Use the following steps to add keys to the registry on your system:

1. Exit AutoCAD.

2. Create a new text file using Notepad and copy the following into it:

   Registry Editor Version 5.00 Windows
   [HKEY_LOCAL_MACHINE\SOFTWARE\Autodesk\ObjectDBX\R19.1\Applications\AcDgnLS]
   "LOADCTRLS"=dword:00000009
   "LOADER"="AcDgnLS.dbx"
   "DESCRIPTION"="DGN Line Style Component"

3. Save to a location of your choice and close the file.

4. Rename the file so that it has a .reg extension instead of .txt. Be sure it does not end with .reg.txt after renaming (right-click > properties to see the full file name).

5. Double-click the .reg file to apply it to the registry. Afterwards, the .reg file can be deleted.