Real time data replication by using EIM

Hi Experts,

Please help on below error to fix. I am trying replicate real time data by using EIM and I have selected the option 'realtime' for source table as well flowgraph panel it is giving me error "transaction rolled back by an internal error: exception 70000008: host unknown" while executing sql procedure.

If I select 'realtime' check option for both panel & source table, activation giving me error -

PROJ_ABCD:proj_ecc1.hdbflowgraph

"PROJ_ABCD/ecc1.hdbflowgraph": flowgraph XML content error; ERROR: No DP realtime Data Source found in the DP realtime flow

if I unchecked real-time option for source table or panel, then no error but any data changes not get replicating in template table.

Also is the source table must be a virtual table.

Please suggest how to fix the error.

Thanks in advance,

Ian