An AutoLISP routine written for AutoCAD Release 13 may fail in AutoCAD Release 14 and later releases. One reason for this problem is that 2D polylines in Release 13 become optimized lightweight polylines (lwpolylines) in AutoCAD Release 14 and above.
Solution
This AutoLISP function returns the vertex of a lwpolyline (print in this case). You can use this function in AutoLISP routines to treat lwpolylines as AutoCAD Release 13 2D polylines.
全部回答（1 ）
线的简称），所以没有此命令，并且是AutoLisp的R13到R14或更高版本的东西，请看英文原文。
Issue
An AutoLISP routine written for AutoCAD Release 13 may fail in AutoCAD Release 14 and later releases. One reason for this problem is that 2D polylines in Release 13 become optimized lightweight polylines (lwpolylines) in AutoCAD Release 14 and above.
Solution
This AutoLISP function returns the vertex of a lwpolyline (print in this case). You can use this function in AutoLISP routines to treat lwpolylines as AutoCAD Release 13 2D polylines.