Hello Vishal,
This error could be because all the models are not loaded correctly.
Have you setup the FIORI search correctly.?
http://help.sap.com/fiori_bs2013/helpdata/en/12/af5252b10d5a64e10000000a423f68/content.htm
Note : Before running the mentioned tasks lists in the above URL, please ensure that your secondary database connection for search to HANA database has been setup correctly.
You can test this connection using the report ADBC_TEST_CONNECTION.
Regards,
Suneeth