logic导入网络表到layout的问题请教

生成的ASCII.ERR文件有有如下警告是什么意思?

Warning: deleting signal $$$19861
Warning: deleting signal USB_DM
Warning: deleting signal USB_DP
Warning: deleting signal $$$19867
Warning: deleting signal $$$15732
Warning: deleting signal SPI_CS2
Warning: deleting signal $$$16832
Warning: deleting signal $$$16548
Warning: deleting signal $$$17217
Warning: deleting signal $$$16674
Warning: deleting signal SPI_CS1
Warning: deleting signal $$$19966
Warning: deleting signal Z2_XF1
Warning: deleting signal Z1_XF3
Warning: deleting signal $$$30594
Warning: deleting signal USB_DECT
Warning: deleting signal MCS5N
Warning: deleting signal MPUIO14
Warning: deleting signal TXD3
Warning: deleting signal USB_SEL
Warning: deleting signal RXD3
Warning: deleting signal MPUIO22
Warning: deleting signal C3220_INT
Warning: deleting signal TD_SYN_EN
**INPUT WARNINGS FOUND**

谢谢！

都是warning，应该不用理它

可能是单网络！

就是,后来我发现是没有连接到任何地方的