How to change from one layer to other layer

You can use leSearchHierarchy to find the objects and leReplace to update the layer.

Andrew may have some hierarchy parsing code which he shares.

Some untested code showing the idea of a recursive layer replacement rather than leReplace:

procedure(CCFreplaceLayersHier(cv @optional (done makeTable('visited nil)))
 let((LP)
  done[cv]=t
  LP=car(exists(lpp cv~>lpps lpp~>layerName=="M1" && lpp~>purpose=="drawing"))
  ; if there are shapes, and this isn't a pcell submaster, and it can be reopened in edit mode
  when(LP~>shapes && !(cv~>superMaster) && dbReopen(cv "a")
    LP~>shapes~>lpp=list("M2" "drawing")
  )
  ; recursively visit all the child masters
  foreach(master cv~>instanceMasters
    unless(done[master]
      CCFreplaceLayersHier(master done)
    )
  )
  t
 )
)

Regards,

Andrew.

Thank you for your replies 

hi Andrew Beckett

the below code is not working but it's executing...... please help me with this

procedure(CCFreplaceLayersHier(cv @optional (done makeTable('visited nil)))
 let((LP)
  done[cv]=t
  LP=car(exists(lpp cv~>lpps lpp~>layerName=="M1" && lpp~>purpose=="drawing"))
  ; if there are shapes, and this isn't a pcell submaster, and it can be reopened in edit mode
  when(LP~>shapes && !(cv~>superMaster) && dbReopen(cv "a")
    LP~>shapes~>lpp=list("M2" "drawing")
  )
  ; recursively visit all the child masters
  foreach(master cv~>instanceMasters
    unless(done[master]
      CCFreplaceLayersHier(master done)
    )
  )
  t
 )
)

I just tried the code above, and it worked for me. I have a technology where the layers are called M1, M2 etc - you'd obviously have to change the layer names in the code if they're called something different.

Then I opened the top level layout, and used:

CCFreplaceLayersHier(geGetEditCellView())

Note however that the code won't replace M1 used in MPP (multi-part path) or in vias, or inside PCells. Of course, I have no idea what the extent of what you're trying to do is...

Regards,

Andrew.