Not sure if this is the right place to post this.
I am currently writing a simple calibre DRC card but have come to an abrupt stop.
I would like to identify the perimeter of all the layout cells in a hierarchical GDS called SCX**** , and from this create a GDS layer showing where they are.
Now it is possible to do this in lavis but I thought it would be cleaner if I could do this with calibre.
Found the answer.
DIGLIB = EXTENT CELL "C14SOI_12T*"