Hello, I have performed druc on addaccu tutorial, the file checked was core.ap , as a result the file core.drc gives some errors. All of them are code 54, (RDS_ALU1,RDS_ALU1) Manhatan distance min 2.5 . the RDS_TECHNO_NAME is cmos_8.rds. I tried with cmos_12 and but druc gives syntax errors. How can I set scr wich generates the .ap file for a no errors druc check? thanks Raśl