I get "No Kerberos credentials found" error after submitting the script

You need a valid Kerberos ticket (link do doku sekce Kerberos) to submit a job. Normally you ontain a Kerberos ticket when upon login to a frontend. A ticket is valid for 10 hours. If the user stays logged in for longer time and Kerberos ticket expires meanwhile, the above-mentioned error message will appear.

To check for current Kerberos tickets, use klist.

To get a new Kerberos ticket, use kinit.