Not all pins could be reached on the net. Check connections

nobody_a

Not analyzed:

Class    Document    Source    Message    Time    Date    No.

3 N  }) q+ P9 I4 T6 Q[Warning]    PCB1-20170524.PcbDoc    Signal Integrity    CLK1: Not all pins could be reached on the net.  Check connections.    10:04:09 AM    5/25/2017    335
! H: n# s5 b* R" a2 d: |3 n% X

nobody_a

这几个红色区域是什么意思？ Not analyzed??