re-attaching library to different tech lib

I am migrating a library from Metal7 to Metal6. So I programmatically
delete M7, change via types (ie. m1m7 to m1m6), and also re-attach
library to the new tech lib. Most all of the vias re-attaches properly
and point to new tech lib, but there seem to be some of the vias that
don't, that are buried down in the hierarchy. I don't see a pattern in
the ones that don't re-attach properly, so I was thinking to
programmatically open all the cells in the library one at a time, and
change the via 'libName' attribute to the new name. I have both tech
libs (old and new) in my cds.lib file, but it will not let me change
that attribute to the new name. I was hoping to get any suggestions to
point me in the right direction or hints on how I might be able to
resolve this. Thank you for any help and/or tips.

 

Most all of the vias re-attaches properly

I'm curious why this happens...

No. It's a read-only attribute. To change an instance reference,
use leReplaceAnyInstMaster() or leRemasterInstances().


There is also ccpRenameReferenceLib(), which corresponds to "Rename Reference Library"
in the Library Manager.



Stéphane

 

I'll try to find out why it is not doing all the symbolic vias, and
post it here if I find out.

I experimented, and leReplaceAnyInstMaster() function will work in my
code well.

Thank you so much for posting, this is very big help.