How to delete all ghost layers outside the visible bbox in Virtuoso Layout?

Jorge,

There are numerous reasons:

1. You may have a shape in the database which was drawn on a layer and/or purpose that is no longer defined in the technology database (maybe the layout was attached a different technology database before, or maybe the tech database was updated)
2. The layer may be marked as invisible
3. It may be invisible and marked as not valid - so it doesn't show up in the layer palette (you could change the valid layers).

I was going to start writing some code to do this but to generalise to cover every situation it would end up needing a bit of time to do right - it's unclear which situation you would be dealing with (and whether it needed to traverse hierarchy to hunt these down). So I decided not to write something (I didn't really have time). However, I did find there's an article which at least covers the situation where an invalid purpose is found: SKILL: To detect shapes on a layer with purpose nil or unknown, later delete them or map to existing purpose. This could be altered to look for layerName being nil too - (this would be point 1 above). There are some related solutions at the bottom of that article which might also be useful too.

Using File->Summary in the layout editor can give you some kind of indication of what you have in the database.

Hope that helps a bit!

Andrew 

Jorge,

There are numerous reasons:

1. You may have a shape in the database which was drawn on a layer and/or purpose that is no longer defined in the technology database (maybe the layout was attached a different technology database before, or maybe the tech database was updated)
2. The layer may be marked as invisible
3. It may be invisible and marked as not valid - so it doesn't show up in the layer palette (you could change the valid layers).

I was going to start writing some code to do this but to generalise to cover every situation it would end up needing a bit of time to do right - it's unclear which situation you would be dealing with (and whether it needed to traverse hierarchy to hunt these down). So I decided not to write something (I didn't really have time). However, I did find there's an article which at least covers the situation where an invalid purpose is found: SKILL: To detect shapes on a layer with purpose nil or unknown, later delete them or map to existing purpose. This could be altered to look for layerName being nil too - (this would be point 1 above). There are some related solutions at the bottom of that article which might also be useful too.

Using File->Summary in the layout editor can give you some kind of indication of what you have in the database.

Hope that helps a bit!

Andrew