Hi Rao,
Strangely, I put the oRs := oCn:RowSet( cSql, {'param'} ) on my init variable function (as once-only declaration) and put oRs:Append() | oRs:SyncChild() | oBrw:Refresh()...
This way it SOLVED my issues
refreshing oRs:oChild datasource of xBrowse ...
Moving forward to another task...