When you convert DWG files to a format compatible with a previous version, current
release information is stripped from objects.
Because converting a drawing to an earlier release format may cause some data loss,
it is recommended to assign a different file name to avoid overwriting the current
Dynamic constraints created in AutoCAD 2010-based products do not display in DWG
Associative dimensions created in AutoCAD 2002-based products or later generally
maintain their associativity when converted to a previous release and then reopened
in the current release of an AutoCAD-based product.
The following dimension enhancements do not lose visual fidelity in previous releases
if they are not edited:
You can specify that annotative objects maintain visual fidelity when they are viewed in AutoCAD 2007-based products and
earlier releases in the Modify Conversion Setup dialog box.
Annotative objects may have multiple scale representations. When visual fidelity is
on, annotative objects are decomposed and scale representations are saved to separate
layers. These layers are named based on their original layer and appended with a number.
When visual fidelity for annotative objects is not selected, a single model space
representation is displayed on the Model tab. Depending on a setting when the drawing
was saved, additional annotation objects might be displayed on the Model tab, and
additional objects might be displayed in paper space viewports at different sizes
than in AutoCAD 2008-based products and later releases.
In an AutoCAD 2008-based drawing, when an annotative block does not have its paper
orientation set to match the layout, and the block contains multiline attributes that
are based on a text style that is not set to match the orientation of the layout,
the attributes might shift positions when the drawing is opened in an AutoCAD 2007-based
product or an earlier release.
If you convert an AutoCAD 2008-based drawing containing layer property overrides,
the overrides are not visible in previous releases. The property override settings
are retained when the drawing is saved in a previous release, and are visible again
when the drawing is opened in an AutoCAD 2008-based product.
For previous releases of AutoCAD-based products, if the VISRETAIN system variable
was set to 0 when the drawing was saved, xref layers containing viewport property
overrides are not retained when opened in DWG TrueView.
If you open an AutoCAD 2008-based drawing in a previous release, property overrides
might display in a thumbnail image. When the drawing is saved with a layout tab, and
then opened in the previous release, those property overrides do not display.
Some of the paragraph spacing and paragraph line spacing options are not supported
when an AutoCAD 2008 multiline text object is opened in AutoCAD 2007 and earlier releases.
The following multiline text formatting features have no visual fidelity in previous releases:
The following multiline text formatting features have some visual fidelity in previous releases (when itâ€™s possible to add white spaces or replace
text with white spaces):
Multiline text with new formatting that is edited and saved in previous releases loses
the new formatting when reopened in AutoCAD 2008-based products.
Editing AutoCAD 2008 tables in previous releases removes AutoCAD 2008 table formatting.
Also, AutoCAD 2008 table cells with long block and text strings may extend outside
of cell borders when opened in previous releases.
For tables that were created with the Data Extraction wizard in AutoCAD 2008-based
products, you canâ€™t edit or update the extracted data in previous releases.
AutoCAD 2008-based products introduced new procedural maps for materials and luminance.
Drawings created earlier than AutoCAD 2007 that contain materials need to be converted.
AutoCAD 2008 can automatically convert old materials to the AutoCAD 2008 format. However,
there are some fidelity issues when saving back to previous versions of AutoCAD.
AutoCAD 2008-based products provide two options for lighting: standard (generic)
lighting and photometric lighting. Previous versions offered only standard (generic)
lighting. There is no explicit conversion required for lights from AutoCAD 2007 to
AutoCAD 2008. Drawings from AutoCAD 2007 open by default in AutoCAD 2008 in the standard
(generic) lighting workflow. The additional photometric properties available in AutoCAD
۲۰۰۸ are available as soon as the photometric lighting workflow is enabled in the
There is a conversion process required for drawings with lighting prior to AutoCAD
۲۰۰۷. AutoCAD-based products include a system variable, 3DCONVERSIONMODE, to automatically
convert drawings with lighting from previous versions to the AutoCAD 2007 and AutoCAD
۲۰۰۸ lighting format.
Other lighting fidelity issues include
In DWG TrueView, ACA (formerly called ADT) custom objects are not upgraded when converting the drawing containing them to a different drawing format.
This is highly desirable.
In contrast, when the ACA Object Enabler is present in AutoCAD-based products, all
ACA objects are upgraded to the latest ACA format. This can present problems when
AutoCAD users on the latest version collaborate with ACA users that are several releases
behind. AutoCAD users can open the ACA file and save it to the AutoCAD 2004 format
used by the previous ACA version, but now the ACA objects are changed to the AutoCAD
۲۰۰۸ versions. When these upgraded ACA objects are encountered in ACA, they are treated
as proxy objects.
Converting a drawing to AutoCAD 2007 format is subject to the following limitations:
Converting a drawing to AutoCAD 2004 format is subject to the following limitations:
Converting a drawing to AutoCAD 2000 format is subject to the following limitations:
Converting a drawing in AutoCAD Release 14/AutoCAD LT 98/AutoCAD LT 97 format is subject
to the following limitations:
>Convert a batch of drawing files between different DWG file formats. The drawing file format changed in the following releases: … AutoCAD R14, AutoCAD LT 98, AutoCAD LT 97.Convert a batch of drawing files between different DWG file formats. The drawing file format changed in the following releases: AutoCAD 2010/LT 2010 AutoCAD …convert DWG files to a format compatible with a previous version, current release information is stripped from objects. Because converting a drawing …… I have been asked to provide a customer with a drawing that I have in either a . drw or .prt format. They require the drawing in .dxf I have been …Files with draw suffix can be found as drawings from Acorn/Risc operating systems. Some Windows programs can open it.convert files to various other file formats. … dwg, AutoCAD Drawing Database File, Adobe Illustrator AutoCADConverter to batch convert your Autodesk AutoCAD drawings and designs to Adobe PDF files quickly and easily. The Batch …files, which use the . dwg … they become primitive CAD drawing elements that SketchUp Pro does support. …. This conversion helps to simulate the appearance of your SketchUp file, …drawing, you can use Visio to open them and convert them to Visio shapes. You can also convert Visio drawings to AutoCAD files.file format developed by Autodesk for enabling data … an exact representation of the data in the AutoCAD native file format, DWG ( Drawing), for which Autodesk for many years did not publish specifications.