The Tomcat catalina.out provides lots of details about what's going on with Tomcat application server, the database connection, and extra application details like authentication/authorization. It's an invaluable troubleshooting tool, and Semarchy support will often ask you to attach the catalina.out file to a support ticket.
NOTE: If you're looking for the PDE log, and not the catalina.out log, follow these instructions to export the PDE log.
For Linux
Find the catalina.out log at /var/log/tomcat8/catalina.out
If Semarchy xDM is on the cloud, you can use scp or a tool like Filezilla to download the log file to your computer to email it to support.
For Microsoft
Find the catalina.out log at <tomcat_install_dir>\logs (example: C:\tomcat\logs)
If you're looking for the PDE log, and not the catalina.out log, follow these instructions to export the PDE log.
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