When I run Sensor Agent (or my client application), I receive the following return code : 40. What does that mean?

The error code “40” indicates the TEAMS-RDS server is not reachable.  You can try to ping the server or open a browser connection to the TEAMS-RDS server web page.  You may also ensure that the Tomcat and TEAMS-RT services are running on the TEAMS-RDS server.  On Linux servers, also check that the TEAMS-RDS broker is running as well.