Hi - will the patch files work if they are specified as INCLUDE files with the main rule file? If so, you can us the GUI to specify the patch files as additional rule files. Do Setup > DRC Options, choose the Include tab, and enter the additional rule files in the entry area for "Include Rule Files".
Hope that helps,
Actually I tried that option but was getting the following error when trying to run drc. I think some variables/layer info are getting repeated in main drc rule files and patch files
Patch1_deck: duplicate original layer specification statement name: PPi.
Patch2_deck: duplicate original layer specification statement name: PPi.