There are a number of steps that need to be taken before Data Services can connect to and extract data from an SAP Business Suite system. Please have a look at the Supplement for SAP for more details.
During the Data Services installation, you have the opportunity to select the features you wish to install. Please ensure that the "Data Services APS Services" are selected, otherwise the metadata import functionality in HANA Studio will not work properly (Data Services Metadata Service and Data Services Viewdata Service).
After the installation is complete, go to the Administrator section of the Data Services Management Console and open the Web Services node. Click on the Web Services Configuration tab and check the select checkbox for the IMPORT_REPO_OBJECT web service. Then select Disable Session Security from the drop-down listbox at the botttom and click on the Apply button. Once you've done this, the Session Security checkbox should be unchecked for this web service. This is mandatory for the metadata import functionality in HANA Studio to work properlly.