I have been trying to export LEF from standard cells layout in order to use that LEF file in Encounter for automatic PnR. From virtuoso I select File -> Export -> LEF and fill the form appropriately but the lefout.log is giving a warning on metal 4 as shown below:
Warning (OALEFDEF-50144): NONDEFAULTRULE: VirtuosoDefaultExtractorSetup: Layer A4: invalid definition. This rule will be ignored. Ensure all layers in the valid routing layers constraints have a minWidth constraint defined and are metal or poly routing material.
When I opened the lef file, it is missing REC and OBS statements etc and only gives 3 lines on origin, foreign and size of the macro, e.g. OR gate. I am sure the lef is not being generated properly. Please guide me what am I missing here.
Thanks for reading.