Logs and traces in HANA Trial

Hi,

I am using the HANA trial edition. When trying to call a procedure like

var conn = $.db.getConnection();

conn.prepareStatement("SET SCHEMA \"NEO_AHY5JAVUAQXOJT9SIED3FJ4Z7\"").execute();

var pstmt = conn.prepareStatement( "select * from ORDERS_VIEW" );

pstmt.execute();

it works fine.

However calling a procedure like

var conn = $.db.getConnection();

conn.prepareStatement("SET SCHEMA \"NEO_AHY5JAVUAQXOJT9SIED3FJ4Z7\"").execute();

var pstmt  = conn.prepareCall( "call MC_GET" ); 

pstmt.execute();

gives a http 500 error when calling the application.

Now my question is where can I find the error logs ?

When trying to set up the administration in the administration perspective I get privileges errors. So how would I do an error investigation in this case ?