When SQLNav gets an
“Error when opening a DB object: ORA-00942: table or view does not exist”
it should refresh the DB Navigator (or ask "do you want to refresh DB Nav?)
I also got a situation where a package body was invalid and it gave me always: ORA-00942: table or view does not exist …and would open a empty panel. In the bottom of the panel the creation date and modified were correct (with INVALID in the next cell)
The only way to solve that was to restart the SQLnav…maybe it was an memory problem like the ones in sql nav 5.5, but without showing that error that in the console?