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CAD tip CAD tip # 3202:

Question CAD 
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Q - question

A closed polyline cannot be extruded.

A - answer Make sure you have a closed, 2D polyline (or lighweight polyline - LWPOLYLINE). The polyline must not be self-intersecting (loops) and should not have any duplicate vertices (even the start- and end-vertex). All vertices should have the same Z-coordinate (in the current UCS).
To fix the complaining polyline, try the OVERKILL Express Tool or retrace it using the _BPOLY command.
100% *  CAD 
23.7.2003    6359x  
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applies to: AutoCAD ·

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