Hi Aamond,
just to make sure do not specify HANA connection in CMC but do it in IDT.
So if the query does not return any results with the current account this is an issue. Can you switch the HANA JDBC connection to use another account that has more rights to the View possibly, meaning enter the credentials specifically for that account in IDT. Also when you validate SQL generated from teh Exploration log in HANA Studio make sure you run the SQL with same account as used in the connection.
Your 2nd question, Indexing errors will show in the Indexing server log. In CMC set logging to High and then go through the workflow. On the server under ~/logging directory the log starts with explorationIndexing...glf