To check LVS using Calibre tool a few following steps are needed.

• In schematic window:
  1. Create netlist of schematic. From main menu → IBM_PDK → Netlist → CDL.
     In new create CDL window (at 1st run) fill a Library name and Top cell name fields with appropriate names. Change run directory if necessary (Calibre LVS generate large number of files)
  2. Prepare LVS netlist. From main menu → IBM_PDK → Netlist → CDL Processor for LVS.
     In CDL processor for LVS window change Run directory to directory with netlist file. Mark the netlist file and move (i.e. using double-click) to files to process tab.
• In layout window:
  1. Run Calibre LVS: main menu → IBM_PDK → Checking → Calibre → LVS.
  2. No trace property and PEX run options set on FALSE
  3. In Input section, netlist tab: unselect export from schematic viewer checkbox and point out the cell_name.netlist.lvs file in the Files path.
  4. Run LVS.