To view diagnostics information, you need READ permission for "CEP management" in Cumulocity IoT. See the information on the Administration application in the User guide at https://www.cumulocity.com/guides/ for details on managing permissions.

If you have READ permission for "CEP management", then links for downloading diagnostics information are available at the bottom of the model manager. These will download zip files that include log file contents, copies of EPL applications, and much more.

It may be useful to capture this diagnostics information when experiencing problems, or for debugging EPL applications. It is also useful to provide to support if you are filing a support ticket.

See the Streaming Analytics guide at https://www.cumulocity.com/guides/ for detailed information on the available diagnostics. This also includes information on additional endpoints that are available for REST requests.