2011

Table Of Contents
DescriptionMissing Reference Types
the drawing or one of the support paths defined in
the Options dialog box. For information about custom
shape files in linetypes, see Shapes in Custom Line-
types in the Customization Guide.
You can use eTransmit to avoid missing files when sharing drawings with
others outside of your company. For more information about eTransmit, see
Package a Set of Files for Internet Transmission on page 1971.
Work with Large Objects
AutoCAD 2010 supports object size limits greater than those available in
previous releases. With increased object size limits you can create larger and
more complex models. Using increased object size limits can result in
compatibility issues with legacy drawing file formats (AutoCAD 2007 and
earlier).
When working with drawings that you might need to exchange with others
using AutoCAD 2009 and earlier, set the LARGEOBJECTSUPPORT system
variable to 0. Setting LARGEOBJECTSUPPORT to 0 warns you when a drawing
contains large objects that cannot be opened by a release of the program prior
to AutoCAD 2010.
TrustedDWG
Drawing Files
DWG, DWT, and DWS files created with Autodesk applications and
RealDWG
-based applications are trusted by Autodesk. When you open a
TrustedDWG file, the following icon displays in the application status bar or
the drawing status bar.
If the DWGCHECK system variable is set to On (1), an alert box is displayed
if
The drawing file format is AutoCAD Release 14 or later and
The drawing file was not originally created by an Autodesk application or
RealDWG-based application.
For more information about TrustedDWG, click the TrustedDWG icon.
Recover Defective Drawing Files
In some circumstances, it is possible that a drawing file becomes defective.
This can result from hardware problems or transmission errors. If a drawing
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