Hello,
to narrow down the Catalog issue I would like to ask you the following.
Open the Admin perspective.
Go to the view "SAP HANA systems"
Press the tirangle on the right.
Choose menu "Customize View"
Choose Content
Deslect everything except Navigator and Catalog.
Do the problems still occur?
1) Yes. Turn on JDBC trace. System-> Properties->JDBC Trace. Please send the last (hanging) SQL statement
2) No. Enable step by step the other navigator contributors. If the problems occurs goto 1)
Best Regards, Wolfgang