This can be resolved by modifying the HOSTS file on the workstation to include the domain references the KB Server is trying to access. The HOSTS file is a text file that contains IP addresses separated by at least once space and then a domain name, with each entry on its own line to map the domain to the IP address.
In both cases, you should be aware of requirements for spaces and double quotes in the parameters to CBMACROS, CBTARGETS, and CBFLAGS. See "Parameter Syntax for CBMACROS, CBTARGETS, and CBFLAGS" on page 84.