Hi Houman,Originally posted in cdnusers.org by EngHan
The correct thing to do is to go back to SoC and understand why filler cell are not placed in the area they should. Once understand the cause, you can then know how to solve it.
If you are sure that there is no issue with filler cell placement, then you may be the unlucky few that use std cell library that can have n-well or diffusion violation that are due to notches. So far, I am aware that only Apollo (not sure about the newer version) can fill up this type of gap. But there is always a workaournd. You can use custom layout to draw a continuous n-well for every cell row, or you can use custom layer in SoC to do this (please don't do this by hand. Use a script).
From the question you post here, look like you are on the way to tape-out soon!