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CAD tip CAD tip # 4000:

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Message: Duplicate definition of block XXXXX ignored

A - answer AutoCAD displays this warning if you try to insert a block (or a drawing containing a block) with the same name as one of the blocks defined in the current drawing. AutoCAD warns that it will use the existing (old) definition of the block.

If you want to redefine (overwrite) the existing definition of a block in your drawing, use the -INSERT (_-INSERT) command as:

_-INSERT oldblockname=newblockname  
and cancel (interrupt) the command right after the first prompt with the ESC key. With this, you will overwrite the old block definition with the new contents from the external file newblockname.DWG
100% *  CAD 
3.9.2004    58428×  
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See also:
Tip 11898:Automatic schedule - number of blocks in a drawing.
Tip 11565:AttDefault - reset block attributes to default values.
Tip 11561:How to create a block with multiple insertion points?
Tip 11439:Replace block instances (incl. dynamic) with another block.
Tip 11404:Operations with attributes inside a block - fields.

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