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CAD tip CAD tip # 4922:

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ARX_ERROR: eNotThatKindOfClass, or eDuplicateKey

A - answer These ARX errors can occur when trying to open a DWG file containing new type of objects (objects coming from a newer version).

If you are opening a .DWG file saved by AutoCAD 2007 family product (saved as 2004-format DWG) in AutoCAD 2006, 2005, or 2004 (or AutoCAD-based application), apply the appropriate AutoCAD 2007 AEC Object Enabler fix.

These Object Enablers for versions 2010, 2009, 2008, 2007, 2006, 2005 and 2004 are available on

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23.3.2006    49255x  
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See also:
Tip 9556:VBA not working - failed to initialize properly.
Tip 8774:Silent installation of Windows applications - MSIEXEC parameters
Tip 8026:AutoCAD 2011 doesn't display documentation views from ACAD 2012.
Tip 7539:How to open CAL raster images in AutoCAD?
Tip 6617:Error AcMapCoordinateTransform.cpp when inserting an image.

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