求救 高手进来吧！Allegro16.0设计的PCB

我用16.0设计了一个PCB,错误都没有了,Performing DRC...No DRC errors detected.

我先出NC drill, 正常NCLegend generation successfull
Legend 1: MANUFACTURING/NCLEGEND-1-12 ... layers TOP to BOTTOM
There were 1 drill legends generated.
 然后我出gerber,可是却出现问题了,提示 database has errors, artwork generated canceled. please run DB doctor,

我运行了DB doctor,报如下的错误,

DBDOCTOR of drawing ****************************************

ERROR IN ATTRIBUTE
  POINTER TO ATTRIBUTE INVALID
   Error was fixed.

ERROR IN ATTRIBUTE
  POINTER TO ATTRIBUTE INVALID
   Error was fixed.

Regenerating DRC
  0 original DRC errors replaced by
  0 current DRC errors.

0 warnings, 2 errors detected, 2 errors  fixed.

我再运行dbdoctor ,就正常了,能出gerber了,但是我再先出nc drill,又会出现上面的问题,大家知道是啥问题吗?

难道 没有人遇到过?

不好意思，我是个新手。今天也碰到同样的问题，来求解的。GERBER是能出，但是导入CAM350时会提示CamWare Limit exceeded.还不知道什么解决。有高手路过的话请赐教。谢谢！