2011

reference that is part of (nested within) another block has a nesting level of
2, and so on.
For a nested block reference, the X,Y, Z coordinate values, scale factors,
extrusion direction, and rotation angle reflect the actual location, size,
orientation, and rotation of the nested block in the world coordinate system.
In some complex cases, nested block references cannot be correctly represented
with only two scale factors and a rotation angle, for example, if a nested block
reference is rotated in 3D. When this happens, the scale factors and rotation
angle in the extracted file record are set to zero.
Error Handling
If a field is not wide enough for the data that is to be placed in it, the data is
truncated and the following message is displayed:
** Field overflow in record <record number>
This could happen, for example, if you have a BL:NAME field with a width of
8 characters and a block in your drawing has a name 10 characters long.
To create an attribute extraction template file
1 Start Notepad.
You can use any text editor or word processor that can save a text file in
ASCII format.
2 Enter template information in Notepad. See
Extract Block Attribute Data
(Advanced)
on page 883 for format information.
3 Save the file with a .txt file extension.
To extract data about a specific tag, insert the tag name in place of the
"numeric" or "character" fields.
WARNING Do not use tab characters when constructing the template file with a
word processor. If you use tab character alignment, the attribute information file
is not created. To align the columns, insert ordinary spaces by pressing SPACEBAR.
The use of tab characters may cause inconsistent alignment.
To extract attribute information
1 At the Command prompt, enter attext.
2 In the Attribute Extraction dialog box, specify the appropriate file format:
CDF, SDF, or DXF.
888 | Chapter 22 Create and Modify Blocks