I routinely get errors when attempting to use installed examples such as below:

Error using findExample (line 35)

Example "RFSatelliteLinkExample" not found in "C:\MATLAB\R2018b\examples\comm\examples.xml".

Error in openExample (line 24)

metadata = findExample(id);

Answer 1

[Walter Roberson]

In your release, R2018b, the example was invoked by

commrfsatlink

and not by openExample.

You are looking at the R2019a documentation but expecting it to work for your R2018b release.