When manually installing a Design Kit in the ADS 2011 environment, there is an issue with pathnames that contain spaces that causes the installation of a Design Kit to fail. Since the default location for a Sonnet installation contains spaces in the pathname, installing the Sonnet Design Kit in the ADS environment normally fails. We strongly suggest installing Sonnet’s Keysight ADS Interface in the Sonnet environment as documented in Manual Installation Using Sonnet to ensure that the Sonnet Design Kit is properly installed.