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CAD tip CAD tip # 7928:

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A
Current versions of AutoCAD support max. 32767 layers in a single DWG file (the definition of the DWG file format has no specified limit for the number of layers). You can see a sample DWG drawing Layers32767.dwg in the Block catalog. When you create a new layer in it, AutoCAD 2011 and 2012 will crash. AutoCAD 2010 has a higher limit of layers (depends on available RAM, each new layer takes about 15 bytes in the DWG file).

You can xref another copy of such drawing, so the total number of layers in a session is not limited by this maximum.

You would rarely need such number of layers for real-life drawings.

ACADACLT.DWG
100% *CAD
21.4.2011    15628×  
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applies to: AutoCAD · ACLT.DWG ·

See also:
Tip 14526:How to export geometry from AutoCAD DWGs to JSON files and import it back?
Tip 12392:Export unfolds of sheetmetal parts to DXF - parameters for iLogic and VBA
Tip 10682:Automatic classification of drawing objects by their properties.
Tip 7319:3ds Max import - AutoCAD Drawing vs. Legacy AutoCAD - the differences.
Tip 3633:How to sort layers in the order of creation?
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