Can't restart session on ORA-03113: end-of-file on communication channel (v 7.1)

When I get ORA-03113: end-of-file on communication channel i can’t reconnect to database

Choice current session is empty, but in list i have connection. When i choose disconnected session I unable to reconnect.

Hi smithsv,

Could you provide more detail reproduce steps for this?

or the issue occur when you leave Nav for a long time?

Michael