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--- rhino:autocad2006crash [2015/09/14]
+++ rhino:autocad2006crash [2020/08/14] (current)
@@ Line 1: / Line 1: @@
+====== Crash When Browsing for a DWG File ======
+Rhino 4.0 and 32-bit Rhino 5 crash while trying to browse for a .dwg file from the Open, Insert, Import, Save, SaveAs, or Export commands.
+=====Cause=====
+Your computer has
+  * 64-bit Windows Vista or 64-bit Windows 7.
+  * AutoCAD 2005, 2006 or 2007. (AutoCAD prior to 2008 does not detect the mode of the OS and installs as a 32 bit application.)
+AutoCAD 2005, 2006 or 2007 installs a shell extension called **AcSignIcon.dll**. This shell extension loads into Rhino's File Open dialog box. This shell extension often causes Rhino to crash while browsing for **.dwg** files.
+=====Solution=====
+Disable the AcSignIcon.dll Shell Extension:
+  - Download {{:rhino:disableacsignicon.zip|DisableAcSignIcon.zip}}.
+  - Extract DisableAcSignIcon.reg.
+  - Double-click DisableAcSignIcon.reg, and follow all the prompts to allow the .reg file to modify the settings on your computer.
+=====Other references:=====
+[[rhino:acercomputerfileopensavedialogcrash|Information about other shell extensions that crash file open dialogs.]]

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