In the process of running LVS and using TRACE PROPERTY to match layout and source property values, there may be some instances in the source netlist that don't have the property. When there are device properties missing in the source netlist for the properties that are being traced, you can receive an error message.
Error: Properties missing on instances in source.
Calibre does allow you to ignore those missing property messages using the SVRF statement "LVS REPORT OPTION E" to disable missing-property discrepancies and make Calibre trace only what is present in the source netlist.
When choosing to use LVS REPORT OPTION E it's important to understand that the discrepancies are being ignored and the potential impact ignoring the missing properties may have on your process.