SAP HANA CEI Segmentation error

Hi All,

in ADT-> Segmentation-> define aliases for SAP HANA DATA source , i am getting following error .

my HANA schema name is HANADEMO and table name is  ZTAB

i am specifying the path as HANADEMO/ZTAB and getting following error .

please guide me to trouble shoot the same.

error : Alias ZAT_CUST: data source view hanademo/ZTAB does not exist

Thanks ,

SWAPNIL GHARAT