Hi, All supporting files (s-params or otherwise) should be scope of [External Model] - These s-param files do not have anything to do with AMI C-code. The fact that BIRD116 covers s-params as part of [External Model] and allows working of same in conjunction with AMI, we do not need this anymore. thoughts? rgds ..kukal Taranjit Kukal | Product Engineering Architect P: 91 120 3984000 www.cadence.com<http://www.cadence.com/>