allegro 运行DB DOCTOR 后出错，该如何解决？

RT,allegro 运行DB DOCTOR 后出错，该如何解决?错误信息如下
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = AD_GND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.
ERROR IN RATSNEST net name = PGND
  POINTER TO RATSNEST INVALID
   Error cannot be fixed.

再运行一遍，试试

意思好像是你锁定网络PGND网络了

放文件上来看看