Integration Error "System.Data.Odbc.OdbcException (0x80131937): ERROR [HY000] [SAP AG][LIBODBCHDB"

Integration Error "System.Data.Odbc.OdbcException (0x80131937): ERROR [HY000] [SAP AG][LIBODBCHDB"

Environment: 

iVend 6.6 integrated with SAPB1 HANA

Problem Statement:

Integration was not working and its showing below message on Event Viewer Log

“System.Data.Odbc.OdbcException (0x80131937): ERROR [HY000] [SAP AG][LIBODBCHDB DLL][HDBODBC] General error;-10821 Session not connected System.Data.Odbc.OdbcConnection.HandleError(OdbcHandle hrHandle, RetCode retcode) at System.Data.Odbc.OdbcConnectionOpen..ctor(OdbcConnection outerConnection, OdbcConnectionString connectionOptions)”

Resolution/Work Around:

Issue can be resolved by installed the ODBC drivers