allegro导入DXF问题

一个矩形的DXF文件，在allegro中new一个shape symbol文件，然后import/dxf，状态栏dxf2a completed successfully, use Viewlog to review the log file.，下面是logfile的内容：
Reading Layer Conversion File
Reading DXF file...
done.
NOTE: Ignoring unsupported element SPLINE on line 1854.
Layer conversion file: F:/library/imag_l.cnv
DXF file: F:/library/imag.dxf
BRD file: F:/library/allegrolib/shape/#Taaaaaa03444.dra
Update existing design?: NO
Use default text?: NO
DXF units: MILLIMETERS
Design units: MILLIMETERS
Design precision: 4
dxf2a complete.

其中这一句NOTE: Ignoring unsupported element SPLINE on line 1854.，然后窗口中什么都没有。，看这意思是不支持SPLINE，看到HELP文件中Height (Z), splines, ellipsis, regions, unions, multiline text, and tapered line values in DXF files are not read into the design database.，照这样说，那我的LOGO，BOARD什么的图形都导不进来了?

请赐教该如何做。，感谢！