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CAD tip CAD tip # 4416:

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Although space characters are perfectly legal in AutoCAD layer names (as long as EXTNAMES is on), there may be older add-on utilities which do not properly handle layers with spaces.

To quickly replace spaces in layer names use the following VBA macro (use e.g. the _VBASTMT command to run it): 

For Each objLayer In ThisDrawing.Layers : objLayer.Name=Replace(objLayer.Name, " ", "_") : Next
ACAD2000ACAD2004ACAD2006
100% *CAD
13.5.2005    15696×  
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applies to: AutoCAD 2000 · AutoCAD 2004 · AutoCAD 2006 ·

See also:
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Tip 14384:Wrong encoding of XLS/CSV/TXT files exported from CAD. Wrong characters on command line.
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